One of the very first superheroes collection I got for Isaac when he was about one was the Mega Bloks' Spider-Man & Friends.
These are extremely cool, well built and fun to play with. Now that he is older he doesn't play with them anymore but I wanted to kept them in our every growing collection. I think they are important and part of our "story".
Here is Isaac with the figures. I wish we would found all of them but hopefully someday we will.