He's already built a self-propelled merry-go-round contraption and spent three months constructing a small rollercoaster in the yard of his home located northwest of Tucson.

7 DIY experiments you and rapper B.o.B can do to prove Earth is round Science. Jan 27, 2016 2:25 PM EDT ... Experiment 5: Ride a merry-go-round Things you’ll need: a ball, ...