I built a very intriguing device which propels a ferromagnet around a circular track. It does have a fairly low maximum velocity but its still pretty neat!
Music:
"TrES-2b Edit - Futuristic Ambient Space Music" By CO.AG Music
https://www.youtube.com/channel/UCcavSftXHgxLBWwLDm_bNvA
By: Tech Planet
Title: Homemade Rotating Cyclotron
Sourced From: www.youtube.com/watch?v=FxIB5lqZUHU