There are a lot of great resources on the Internet in using Lego for math fun. I tried to introduce this activity from Early Learning with Marta, Eaton and Nathaniel on using Lego bricks to just do some basic counting. So you stack the Lego bricks in numbers and then arrange them from 1 to 10. Sounds fun right? Hmmm... but Nat wasn't very into it. Maybe he just didn't like stacking them in a straight tower as he's already into making cars, boats and aeroplanes with his Lego bricks. I think this will be suitable for kids who are younger and just got exposed to Lego. Will try it with the second kid. Heh.