i got to come up with something for a science fair for school but i have got no idea what to do! something unicycle/bc wheel related would be cool but you guys got any other ideas? 
how a bicycle freewheel works.
(and how it could be modified to suit other needs: that’s my present headache)
Auto Balancing Electric Unicycle?
A unicyclist comprised of parts acquired from graves.
Put’s a whole new spin on the term G-uni…