building with k'nex builds brains

The weird thing is, if you google 'lego' and 'math', you get some links about how to teach math using legos. Like this one which isn't too bad.

However, I've watched my kids sit down with a box (okay, it's a HUGE box) of legos and figure it all out on their own. That's why unschooling is so cool. I Trust that my kids can learn this stuff, without being spoon fed. Anyway, my four year old figured out a pretty cool truck. And then modified it to hold a nuclear warhead (made again, from k'nex, no fears here)

Anyway, for more about unschooling math, check out Joyce's website here.