BB-8 maybe the coolest new droid in the new Star Wars film but I did wonder how does it move.
This Star Wars t-shirt explains it all.
As you can see the ball part of the BB-8 is see through on this t-shirt and you can see a rodent kind of creature makes this robot roll around.
Hamster wheels are know to all of us and it looks like BB-8 is just a big hamster wheel.
