My son is 4 and loves dot to dot and maze books. He like his Leapster. We have the Rush Hour game and he likes that a lot. He has a box of gears that he can make into a robot that he likes. Play dough and Silly Putty keep him occupied too. He likes any kind of craft. I print worksheets off of the Internet and keep them in a drawer for him in the kitchen and he likes pulling them out and doing them.