Abstract: Improved methods for tuning ocarinas to extend their capabilities, musical ranges, and ease of use. Ocarinas having enhanced fingering patterns using subholes, split toneholes, additional tonehole(s), and/or an additional thumbhole. Enhancements to cross-fingered ocarinas with one or two chambers and linear-fingered ocarinas with two or more chambers.

Abstract: An improved roller coaster system having one or more tracks that may exist in differing orientations on one support spine or equivalent supporting structure. Passengers may be rotated independently of the orientation of the tracks an essentially unlimited amount of times in either direction about predetermined axes utilizing inertia as the motive force. If multiple tracks are used, each may run separately from the others in portions of the circuit to provide unique track elements for each set of riders. Furthermore, each track may have its orientation and position relative to the support system exchanged with other tracks in the system.