smile Probably a bit more than you were thinking but my kids LOVE Vi Hart -


If that is a bit much try our gateway to Vi Hart for the little kids (DD giggled her head off at 4 over this one) -


or

https://www.youtube.com/playlist?list=PLaNzoFtkQ7rbt5ac9qdi76iNKuqZWQkB3

Hexaflexagons have occupied hours in planes, trains and automobiles. Even our less geeky friends have embraced them.

DS's favorite thing in kindergarten was infinity and he was very annoyed that the teachers kept thinking his 8's were wrong to be sideways.... Probably should have clued us in to his giftedness but we were a little slow wink