I'm trying to find a birthday present for a friends 3 year old little boy and he just got a 3DS XL for Christmas. His only games so far are Mario Kart and Lego Batman 2. He is really into super heroes. Does anybody have any suggestions on a good game(s) in the $20 range that can keep a 3 years old attention for awhile and isn't to difficult? I'm thinking of getting him Nintendogs but I'm not sure if that would be to difficult for him. He is a very bright child.