There are games but so, so much more including fun things to build, videos, astronaut exercise routines...
It's math, turbocharged. See how many problems you can complete in 2 minutes.
XP Math
Learn any kind of math and have fun.
Physicsgames.net offers dozens of different simple games to choose from that help you learn about physics.
A strange genetic mutation has led to a zombie outbreak. You are the leading scientist on gene editing and are the world's last hope!
This deceptively simple game is actually a lot of fun. You can experiment with combining different elements, such as fire or dirt, to create something entirely new!
Math Playground
Give your brain a workout and have some fun.
Math Games
More math games for all grades and levels of ability.