- https://flexboxfroggy.com/ CSS Flexbox
- https://cssgridgarden.com/ CSS Grid
- https://anchoreum.com/ CSS positioning
- https://ohmygit.org/ Git
- https://mystery.knightlab.com/ SQL
- https://warriorjs.com/ JS turtle game
- https://cssbattle.dev/ CSS daily
- https://www.codingame.com/ Bunch of stuff
- https://cryptozombies.io/ Crypto stuff
- https://www.tynker.com/ More for kids?