About Number Play
Play with counting and cardinality. Compare representations, including word, numeral, ten frame, and objects. Hear the number spoken aloud in two different languages. Challenge yourself to subitize numbers up to ten!
How to play Number Play
Everything is hands-on: drag, click and experiment — the simulation reacts instantly. Play with counting and cardinality.
Questions & answers
- What is Number Play?
- Number Play is a free interactive simulation from PhET Interactive Simulations (University of Colorado Boulder) that you can play right in your browser on crumble.lol — no downloads and no sign-up. Play with counting and cardinality. Compare representations, including word, numeral, ten frame, and objects.
- What can kids learn from Number Play?
- It helps kids explore: coordinate across multiple representations of a number: written/spoken word, numeral, ten-frame, ones, and objects. subitize to; predict the next number in a sequence. identify the number of objects in a group. given a number from 1-20, count out that many objects. determine how many objects there are in a group or ten-frame, up to.
- What age is Number Play good for?
- It is designed for elementary school (roughly ages 5–10), and curious kids outside that range can absolutely enjoy poking around it too.
- Is Number Play free to play?
- Yes — Number Play is completely free on crumble.lol and runs fully in your browser on computers and tablets.