Brain Games - Boost memory power with free brain games
Robo Wunderkind - Coding and robotics made easy for kids 🤖
Dualnback.works - Dual N-back is a specific brain training exercise, that's been shown by research - it might improve fluid intelligence.
Brickit - Use ML to detect what can be built from your pile of legos
Pixelogic - Daily Picross - Nonogram logic game with 5000+ puzzles and a daily puzzle
PictoBlox - Coding for kids: Program robots. Make games. Do much more.