Abstract: A device for converting boot-attached ice skates into roller skates and having a casing which fits over the skate, and is buckled to it at about its center by a belt and is attached to the blade at its rear by means of an elasticized band or spring which can be easily attached or released. The casing is equipped with roller skate wheels which rotate upon shafts which are embedded in rubber or any other similar material, to provide resilience to the wheels.

Abstract: This invention consists of a unicycle having a rubber tire equipped double wheel, located within a light adjustable body which serves as a seat and a handle for holding onto. It is further equipped with a water container located between the double wheel, and at the base of the unicycle, in order to provide greater stability. The unicycle is operated by a pair of the usual bicycle pedals.