Abstract: Method for making a wheel composed of a rigid plastic inner section forming the wheel hub and rim and a resilient plastic tire section encircling the rim. A key formed integrally with the rim extends radially outward therefrom and interlockingly projects into the tire so as to mechanically connect the tire to the rim all around the wheel. The key can be formed with axially extending portions spaced radially outboard of the rim and terminating flush with the outer surface of the tire section so as to provide colored side wall decorations at one or both sides of the wheel. A method of molding the tire directly onto the discoid section is also disclosed.

Abstract: A tree house kit includes a number of identical frames for attachment around a tree trunk. The array of frames supports floor panels and may also support wall and roof panels all made from templates provided in the kit to form a complete enclosure around the tree trunk. Each frame includes a self-leveling, telescoping floor panel supporting section which may be adjusted so that the array of frames can be installed on irregular tree trunks and trunks with different diameters, yet still maintain the floor in a level condition. Each frame may also include wall and roof panel supporting sections which mate with the floor supporting section and which also adapt themselves to irregularities in the tree trunk.

Abstract: A foldable child walker includes two inverted U-shaped frame members pivotally joined at intermediate points in a scissor-like fashion. The lower, or free, ends of the legs of the frame members are pivotally mounted to an annular base supported on a plurality of castered wheels. A flexible seat is suspended from the upper lateral portions of the frame members. Various mechanisms allow folding of the walker into a flat, compact package, convenient for storage or carrying. For example, in one embodiment, one of the two frame members has telescoping legs which are locked in selected positions of adjustment by spring-loaded release buttons to maintain the walker in selected upright positions above the base. When the walker is unoccupied, each button can be released to fold the frame members into a flat position against the base. In another embodiment, the legs in one of the two frame members are articulated below the pivotal connection the other frame member.