“Bicycle” means any device upon which any person may ride, propelled by human power through a belt, chain or gears, and having either two or three wheels in tandem or tricycle arrangement, excepting therefrom any such device not more than three feet in height, used by small children. (Ord. 2670 § 1, 1996; Ord. 1830 § 1, 1978; Ord. 973 § 1, 1966; prior code § 19.1.3(B)).