I have two massive bins of Legos in the garage. Legos were my primary thing as a kid.
I remember when I was 10, I went to Space Camp near the Kennedy Space Center. I had the lucky opportunity of being one of a very select group of kids who got into the Robotics group (30 kids out of at least 1000), and they used the Lego Mindstorm kits. You talk about fun. xD
As a side project, my computer science teacher is teaching me how to program small PIC chips.
I might incorporate some servos and legos into that. xD