If you want to let your child exercise his/her brain you could try these games


They can get a sense of big distances with these websites:


Teach math

Teach programming

Learn programming resources/games/classes for everyone.

Programming contests

Teach everything

PS. Most of the kid games are recommended by Mihai S.

Games Box

Blokus Blokus junior Thinkfun spacerails bricklink shapescapes tangram