Little toys and experiments
Explore the names of ridiculously large numbers, all the way up to a millinillinillinillinillion.
Drag the hands or type a time — learn to tell time with an interactive clock.
A colorful calculator with big, friendly buttons — tap away!
Mix colors together and see what you get — red + blue = ?
Combine fraction pie pieces to fill a circle — how many ways can you make a whole?
Tap a shape to see it up close and learn its name — from circles to decagons!
Pick how many digits of π to show and watch them appear — up to a million!
Type any number and see how the Romans would write it — from I to nearly four trillion!
Type any number and see how to write and say it in Chinese — from 一 all the way to 不可思议!
Is your number prime? Line it up in blocks, split it into primes, and hop from prime to prime!
Is your number odd or even? Line the blocks up in pairs and see if one is left over!
Tap the Sun, the planets, their moons and the dwarf planets to see them up close and learn their names!
Hop from star to star and meet the planets round them — lava worlds, two-sun skies and planets where it rains glass!