College students sure are having fun in class these days. First, you get to launch things into space for credit. And now, you can even build robots.

Lucky students at the University of Florida recently designed their very own robots. These robots aren't just for show: they even perform nifty operations such as serving drinks, playing ball, and flying while carrying heavy objects. Cooool.

It looks almost like any other shopping cart, except sensors allow it to follow the shopper around the supermarket and to slow down when needed so items can be placed into it, and it never crashes into anyone's heels.

Gregory Garcia dreamed up the robotic cart to solve a childhood peeve of being accidentally hit with shopping carts by his sister.

His cart, also known as B.O.S.S. for Battery Operated Smart Servant, was one of about 30 robots on display Wednesday by students at the University of Florida, who worked the past semester on the projects using their engineering backgrounds.

What's the coolest thing you've ever made in class?