Abstract: A pair of closely spaced juxtaposed first and second panels including relatively straight and parallel corresponding marginal edge portions are provided. An elongated narrow strip panel extends longitudinally along, transversely between and joined to the parallel marginal edge portions of the first and second panels by integral "living" hinges. Marginal walls or curbs are supported from one of the first and second panels and extend between the latter. The spacing between the first and second panels is slightly greater than the thickness of a domino game piece and the panels are swingable to positions coextensive with the narrow strip panel.

Abstract: A longitudinal frame is provided having upper front and rear end portions, a first stationary wheel supporting fork is dependingly supported from one of said portions and a second wheel supporting fork is oscillatably supported from the other frame portion for angular displacement about an outstanding axis. Rotatable mechanically operated power input structure is journaled from a lower intermediate length portion of the frame and drivingly connected to the wheel journaled from the first fork and the upper front and rear end portions of the frame have an oscillatable steering control and a stationary seat supported therefrom. The oscillatable steering control is operatively connected to the second wheel supporting fork and the rotatable power input structure includes a transverse horizontal shaft drivingly connected to the wheel of the first fork and having oscillatable pedal cranks operatively connected thereto through ratchet mechanisms.