crumble.lol
A big toy box of games, puzzles and science fun.
170 things to play
🧩 Puzzle
15
Hextris
Spin the hexagon to catch falling colors before they stack up!
🧩 Puzzle
2048
Slide the tiles and join the numbers to reach the mighty 2048!
🧩 Puzzle
Match Three
Swap the gems and line up three in a row.
🧩 Puzzle
Blocks
A quick puzzle of stacking and clearing colorful blocks.
🧩 Puzzle
Candy Crunch
Swap sweets and crunch the matching candy rows.
🧩 Puzzle
Pairs
Flip the cards and find all the matching pairs.
🧩 Puzzle
Minesweeper
Use the number clues to clear the field without a boom.
🧩 Puzzle
Sokoban
Push every crate onto its spot — but don't get stuck!
🧩 Puzzle
Parking Jam
Slide the cars out of the traffic jam one at a time.
🧩 Puzzle
Tic-Tac-Toe
Three in a row wins — beat your buddy!
🧩 Puzzle
Blockfall
Spin and stack the falling blocks to clear tidy lines.
🧩 Puzzle
Wordle
Guess the secret word in six tries — green means right!
🧩 Puzzle
Sudoku
Fill the grid so every row, column and box has 1 to 9.
🧩 Puzzle
Chess
Play chess against a real computer brain — pick your level!
🧩 Puzzle
Solitaire
The classic card game of patience — stack them all!
🧩 Puzzle
👾 Arcade
18
Pac-Man
Chomp all the dots and dodge the four cheeky ghosts!
👾 Arcade
Clumsy Bird
Flap flap flap! Squeeze through the trees without bonking.
👾 Arcade
Breakout
Bounce the ball and smash every brick — a true classic.
👾 Arcade
Snake
Eat the apples, grow longer, don't bite your own tail!
👾 Arcade
Asteroids
Spin your ship and blast the space rocks into stardust.
👾 Arcade
Blockade
Two snakes, one arena — trap your friend first! (2 players)
👾 Arcade
Coin Runner
Dash around and grab every coin before time runs out.
👾 Arcade
Space Invaders
Defend the planet from waves of wobbly invaders.
👾 Arcade
Space Shooter
Weave through space and zap the meteor storm.
👾 Arcade
Tank
Rumble around the arena in your little toy tank.
👾 Arcade
Balloon Smasher
Pop the balloons before they float away!
👾 Arcade
Geometry Monster
Gobble the good shapes, dodge the spiky ones!
👾 Arcade
Plinko
Drop the ball and watch it bounce into the points!
👾 Arcade
Paddle Battle
Classic paddle-and-ball battle — first to five wins!
👾 Arcade
Goose Bomberman
Honk! Boom the crates and outfox the silly geese.
👾 Arcade
Road Crosser
Hop across busy roads — don't get squished!
👾 Arcade
Bomb the Crate
Knock down the crate towers with well-aimed booms!
👾 Arcade
Fruit Slicer
Swipe to slice the flying fruit — juicy combos!
👾 Arcade
🕹️ Platformer
6
Pixel Platformer
Run, jump and zap through a crumbling pixel world.
🕹️ Platformer
Endless Runner
Jump the obstacles and run as far as you can!
🕹️ Platformer
Super Mario Land
A tiny remake of the classic Game Boy adventure.
🕹️ Platformer
Run Dino Run
Jump the cactuses and keep that dino running!
🕹️ Platformer
Geodash
Tap to jump the spikes in this speedy rhythm dash.
🕹️ Platformer
Doodle Jump
Bounce up the doodle platforms — higher, higher, higher!
🕹️ Platformer
🏁 Racing
1
💻 Coding
7
Blockly Puzzle
Snap the picture blocks together — your very first coding puzzle.
💻 Coding
Blockly Maze
Drag code blocks to walk the little explorer through the maze.
💻 Coding
Blockly Bird
Program the bird to catch worms and swoop back to its nest.
💻 Coding
Blockly Turtle
Code the turtle to draw shapes, stars and spirals.
💻 Coding
Blockly Movie
Make your own little animated movie out of code blocks.
💻 Coding
Pond Tutor
Learn to aim your duck's water splash with real code.
💻 Coding
Pond Battle
Write code to out-swim and out-splash the other ducks!
💻 Coding
🎵 Music
2
🎨 Create
1
🏗️ Build
1
➗ Math
51
Area Builder
Create your own shapes using colorful blocks and explore the relationship between perimeter and area.
➗ Math
Area Model Algebra
Build rectangles of various sizes and relate multiplication to area.
➗ Math
Area Model Decimals
Build rectangles of various sizes and relate multiplication to area.
➗ Math
Area Model Introduction
Build rectangles of various sizes and relate multiplication to area.
➗ Math
Area Model Multiplication
Build rectangles of various sizes and relate multiplication to area.
➗ Math
Arithmetic
Race the grid: multiply, factor and divide like a champ.
➗ Math
Balancing Act
Load up the seesaw and keep it perfectly balanced!
➗ Math
Build a Fraction
Build fractions from shapes and numbers to earn stars in this fractions game or explore in the Fractions Lab.
➗ Math
Calculus Grapher
Manipulate a graph of any function and see graphs of its integral, first derivative, and second derivative.
➗ Math
Center and Variability
Center and Variability allows students to explore and compare measures of center and variability, including…
➗ Math
Curve Fitting
Drag data points and their error bars and watch the best-fit polynomial curve update instantly.
➗ Math
Equality Explorer
Explore what it means for a mathematical statement to be balanced or unbalanced by interacting with objects…
➗ Math
Equality Explorer: Basics
Explore what it means for a mathematical statement to be balanced or unbalanced by interacting with objects…
➗ Math
Equality Explorer: Two Variables
Explore what it means for a mathematical statement to be balanced or unbalanced by interacting with integers…
➗ Math
Expression Exchange
Build coin expressions, then exchange them for variable expressions.
➗ Math
Fourier: Making Waves
Add up sines or cosines to make waves of different shapes.
➗ Math
Fraction Matcher
Match pizzas, pies and bars to their fractions.
➗ Math
Fractions: Equality
Build equivalent fractions with different denominators.
➗ Math
Fractions: Intro
Explore fractions while you help yourself to 1/3 of a chocolate cake and wash it down with 1/2 a glass of…
➗ Math
Fractions: Mixed Numbers
Explore fractions while you help yourself to 1 and 1/2 chocolate cakes and wash it down with 1/3 a glass of…
➗ Math
Function Builder
Play with functions while you ponder Art History.
➗ Math
Function Builder: Basics
Play with functions while you ponder Art History.
➗ Math
Graphing Lines
Explore the world of lines.
➗ Math
Graphing Quadratics
Discover how changing coefficients changes the shape of a curve.
➗ Math
Graphing Slope-Intercept
Explore slope-intercept form of a line.
➗ Math
Kepler's Laws
Interact with the variables to discover how planetary objects moves in elliptical orbits, and the other…
➗ Math
Least-Squares Regression
Create your own scatter plot or use real-world data and try to fit a line to it!
➗ Math
Make a Ten
Snap numbers together to make tens — adding made fun.
➗ Math
Masses and Springs
Hang masses from springs and adjust the spring constant and damping.
➗ Math
Mean: Share and Balance
Explore the mean by leveling cups of water, distributing candy bars, fairly sharing apples, and finding the…
➗ Math
Number Compare
Compare numbers represented as numerals, objects, groups, and ten frames.
➗ Math
Number Line: Distance
Subtraction is more than an operation- it is also the distance between two numbers!
➗ Math
Number Line: Integers
What do elevation, account balances, and temperature have in common?
➗ Math
Number Line: Operations
Explore operations with integers using an authentic context of net worth, then generalize with a number line.
➗ Math
Number Pairs
Create number pairs to compose, decompose, and add numbers from 0-20 in multiple contexts.
➗ Math
Number Play
Play with counting and cardinality.
➗ Math
Ohm's Law
See how the equation form of Ohm's law relates to a simple circuit.
➗ Math
Pendulum Lab
Play with one or two pendulums and discover how the period of a simple pendulum depends on the length of the…
➗ Math
Plinko Probability
Drop balls through a triangular grid of pegs and see them accumulate in containers.
➗ Math
Projectile Data Lab
The Projectile Data Lab simulation allows students to engage in hands-on data collection and analysis through…
➗ Math
Projectile Motion
Blast a car out of a cannon, and challenge yourself to hit a target!
➗ Math
Projectile Sampling Distributions
Engage in hands-on data collection and analysis through the rich context of launching projectiles.
➗ Math
Proportion Playground
Play with ratios and proportions by designing a necklace, throwing paint balloons, playing billiards, or…
➗ Math
Quadrilateral
Explore the properties of and relationships between named four-sided shapes by moving sides and corners of a…
➗ Math
Ratio and Proportion
Play with the left and right hands in different ways, and explore ratio and proportion.
➗ Math
Resistance in a Wire
Observe changes to the equation and wire as you play with the resistivity, length, and area sliders.
➗ Math
Trig Tour
Take a tour of trigonometry using degrees or radians!
➗ Math
Unit Rates
Discover the unit rate while shopping for fruits, vegetables, and candy.
➗ Math
Vector Addition
Explore vectors in 1D or 2D, and discover how vectors add together.
➗ Math
Vector Addition: Equations
Experiment with vector equations and compare vector sums and differences.
➗ Math
Wave on a String
Wiggle the string and make waves dance.
➗ Math
⚡ Physics
23
Bending Light
Explore bending of light between two media with different indices of refraction.
⚡ Physics
Buoyancy
When will objects float, and when will they sink?
⚡ Physics
Buoyancy: Basics
When will objects float, and when will they sink?
⚡ Physics
Capacitor Lab: Basics
Explore how a capacitor works!
⚡ Physics
Charges and Fields
Arrange positive and negative charges in space and view the resulting electric field and electrostatic…
⚡ Physics
Circuit Construction Kit: AC
Experiment with an electronics kit!
⚡ Physics
Circuit Construction Kit: AC - Virtual Lab
Do you like Circuit Construction Kit: AC, but want to use only in-line ammeters?
⚡ Physics
Circuit Construction Kit: DC
Experiment with an electronics kit!
⚡ Physics
Circuit Construction Kit: DC - Virtual Lab
Do you like Circuit Construction Kit: DC, but want to use only in-line ammeters?
⚡ Physics
Collision Lab
Investigate simple collisions in 1D and more complex collisions in 2D.
⚡ Physics
Energy Skate Park
Learn about the conservation of energy at the skate park!
⚡ Physics
Energy Skate Park: Basics
Send the skater flying and watch energy zoom around.
⚡ Physics
Faraday's Electromagnetic Lab
Experiment with magnets and coils to learn about Faraday's Law.
⚡ Physics
Faraday's Law
Investigate Faraday's law and how a changing magnetic flux can produce a flow of electricity!
⚡ Physics
Forces and Motion: Basics
Push, pull and win the tug-of-war with physics!
⚡ Physics
Friction
Move the Chemistry book and observe what happens.
⚡ Physics
Generator
Generate electricity with a spinning bar magnet.
⚡ Physics
Geometric Optics
How does a lens or mirror form an image?
⚡ Physics
Geometric Optics: Basics
How does a lens or mirror form an image?
⚡ Physics
Hooke's Law
Stretch and compress springs to explore the relationships between force, spring constant, displacement, and…
⚡ Physics
Static Zap
Scuff the foot on the carpet… then touch the doorknob. ZAP!
⚡ Physics
Magnets and Electromagnets
Explore the interactions between a compass and bar magnet.
⚡ Physics
Masses and Springs: Basics
Hang masses from springs and discover how they stretch and oscillate.
⚡ Physics
⚗️ Chemistry
22
Acid-Base Solutions
How do strong and weak acids differ?
⚗️ Chemistry
Atomic Interactions
Explore the interactions between various combinations of two atoms.
⚗️ Chemistry
Balancing Chemical Equations
How do you know if a chemical equation is balanced?
⚗️ Chemistry
Beer's Law Lab
“The thicker the glass, the darker the brew, the less the light that passes through.” Make colorful…
⚗️ Chemistry
Build a Molecule
Starting from atoms, see how many molecules you can build.
⚗️ Chemistry
Build a Nucleus
How does changing the number of neutrons or protons affect the nuclear species, the stability of a nucleus…
⚗️ Chemistry
Build an Atom
Stack protons, neutrons and electrons to build your own atom!
⚗️ Chemistry
Concentration
Watch your solution change color as you mix chemicals with water.
⚗️ Chemistry
Coulomb's Law
Visualize the electrostatic force that two charges exert on each other.
⚗️ Chemistry
Energy Forms and Changes
Explore how heating and cooling iron, brick, water, and olive oil adds or removes energy.
⚗️ Chemistry
Isotopes and Atomic Mass
Are all atoms of an element the same?
⚗️ Chemistry
Models of the Hydrogen Atom
This simulation is designed for undergraduate level students who are studying atomic structure.
⚗️ Chemistry
Molarity
What determines the concentration of a solution?
⚗️ Chemistry
Molecule Shapes
Explore molecule shapes by building molecules in 3D!
⚗️ Chemistry
Molecule Shapes: Basics
Explore molecule shapes by building molecules in 3D!
⚗️ Chemistry
pH Scale: Basics
Test the pH of everyday liquids such as coffee, spit, and soap to determine whether each is acidic, basic, or…
⚗️ Chemistry
Quantum Coin Toss
Compare the similarities and differences between classical biased coins and quantum "coins" that can be…
⚗️ Chemistry
Quantum Measurement
Explore 2-level quantum systems and the results of measuring quantum states.
⚗️ Chemistry
Reactants, Products and Leftovers
Create your own sandwich and then see how many sandwiches you can make with different amounts of ingredients.
⚗️ Chemistry
Rutherford Scattering
How did Rutherford figure out the structure of the atom without being able to see it?
⚗️ Chemistry
States of Matter
Watch different types of molecules form a solid, liquid, or gas.
⚗️ Chemistry
States of Matter: Basics
Freeze it, melt it, boil it — play with wiggling molecules.
⚗️ Chemistry
🪐 Earth & Space
17
Balloons & Static
Rub the balloon on the sweater and watch it stick with static!
🪐 Earth & Space
Blackbody Spectrum
How does the blackbody spectrum of the sun compare to visible light?
🪐 Earth & Space
Density
Why do some materials like wood float in water, and others don’t?
🪐 Earth & Space
Diffusion
Mix two gases to explore diffusion!
🪐 Earth & Space
Gas Properties
Pump gas molecules to a box and see what happens as you change the volume, add or remove heat, and more.
🪐 Earth & Space
Gases Intro
Pump gas molecules to a box and see what happens as you change the volume, add or remove heat, and more.
🪐 Earth & Space
Gravity and Orbits
Move the sun, earth, moon and space station to see how it affects their gravitational forces and orbital…
🪐 Earth & Space
Gravity Force Lab
Visualize the gravitational force that two objects exert on each other.
🪐 Earth & Space
Gravity Force Lab: Basics
Visualize the gravitational force that two objects exert on each other.
🪐 Earth & Space
Greenhouse Effect
How do greenhouse gases affect the climate?
🪐 Earth & Space
Magnet and Compass
Explore the interactions between a compass and bar magnet.
🪐 Earth & Space
Molecules and Light
Turn light source on to explore.
🪐 Earth & Space
My Solar System
Build your own system of heavenly bodies and watch the gravitational ballet.
🪐 Earth & Space
pH Scale
Test the pH of things like coffee, spit, and soap to determine whether each is acidic, basic, or neutral.
🪐 Earth & Space
Under Pressure
Explore pressure under and above water.
🪐 Earth & Space
Wave Interference
Make waves with a dripping faucet, audio speaker, or laser!
🪐 Earth & Space
Waves Intro
Make waves with a dripping faucet, audio speaker, or laser!
🪐 Earth & Space
🧬 Biology
6
Color Vision
Mix red, green and blue light to paint what you see.
🧬 Biology
Gene Expression Essentials
Express yourself through your genes!
🧬 Biology
Membrane Transport
Add different biological solutes to either side of a cell membrane and observe their behavior based on solute…
🧬 Biology
Molecule Polarity
When is a molecule polar?
🧬 Biology
Natural Selection
Explore how organisms with different traits survive various selection agents within the environment.
🧬 Biology
Neuron
Stimulate a neuron and monitor what happens.
🧬 Biology