[Greylight]

It's hard to top most of what has already been mentioned, but one of the biggest and best toys I had as a kid was the Technodrome playset from Teenage Mutant Ninja Turtles.

It was awesome. It was big, it was bad, and it could squash some turtles. Rolling across the hardwood floor, it rumbled just like it did on the show. Did one of the Turtles escape? Send the giant eyeball rolling after him, then open the panels and lock him up in the prison cell inside. While Bebop's recovering in the medical bay, Rocksteady mans the laser cannon. Shredder is plotting revenge and sets his sights on Leonardo in the computer station. A Foot Soldier makes Krang angry, so he gets sent through the trap door, while the Neutrinos fly by the sticker/portal into Dimension X.

All that, and the fold-out pegs that hold up the panels are mechanical feet. Totally radical playset, dude!