When I was a kid, I had this digital alarm clock that transformed into a tank (read: it transformed into an alarm clock with a cannon sticking out of it and a dude sitting on top). There was a whole bunch of different ones, like a soccer trophy that turned into a turret, a flashlight that turned into a rocket, a coke can that turned into...no idea what, and a computer that turned into a large base. There was even a single episode cartoon made to promote these. They were around in early 90's I think. Any ideas?