Abstract: A cooler includes a body, a cover coupled to the body, and an extendable handle. The body includes a base, a first and second sidewall extending from the base and positioned to face one another, and a third and fourth sidewall extending from the base and positioned to face one another. The third and fourth sidewalls extend from the first sidewall to the second sidewall. The handle includes a first and second bar and a center bar extending from one end of the first bar to one end of the second bar. The handle is positionable in an extended position and a retracted position. In the retracted position, the horizontal component of the distance from the center bar to the fourth sidewall is less than when the positioned in the extended position. The handle is either slidably coupled or telescopically coupled to the first and second sidewalls.

Abstract: A tricycle convertible to a bicycle. The tricycle has a first wheel rotatably mounted on one end portion of a frame, and a pair of laterally spaced wheels rotatably mounted on a second end portion of the frame, wherein the laterally spaced wheels are movable, while the tricycle is in motion, between a first position with relatively wide ground-level spacing and a second position with minimal ground-level spacing. A wheel hub capable of providing adjustable wheel camber has left and right pivotally mounted axles extending laterally from the hub body, the axles each adapted to support a wheel and mounted so as to pivot vertically, and a dual camber control mechanism coupled to the axles and adapted to provide coordinated camber adjustment in the same direction for wheels on both axles. The hub has sufficient range of motion to allow the wheels to change from negative camber to positive camber, and is useful in a method of stabilizing a bicycle or the like to increase safety during rider training.