Marvel Super Hero Mashers Hulk Spider-Man and Captain America
The idea of build-able Super Hero characters has been tried several times but never so well as the new Marvel Super Hero Mashers. They have a good blend of action figure, and building set. Simply switch out legs and arms and heads to make some pretty cool or funny combinations. A ton of characters out there to start with and you have lots of customizable fun. I found that the best combos are simply doing just two, so start there as see if you like them.