Hullabalu - Interactive stories for kids
Brain Games - Boost memory power with free brain games
Night Zookeeper - Help children develop storytelling skills
Dualnback.works - Dual N-back is a specific brain training exercise, that's been shown by research - it might improve fluid intelligence.
Tappity - Tappity teaches your child about science from experts.
Pixelogic - Daily Picross - Nonogram logic game with 5000+ puzzles and a daily puzzle