Abstract: A toy assembly includes a base member, a slender track member mounted on the base member and formed as a continuous loop, and at least one toy piece formed with a coupling hole for coupling slidably with the track member. The track member has a track groove formed continuously therealong. The toy piece further has a key projection that projects into the coupling hole and that engages slidably the track groove of the track member.

Abstract: A transparent spherical toy includes upper and lower shell halves. The upper shell half has a bottom end face, a thickness reduced rim portion extending downwardly from the bottom end face, an outer recess formed outside of the inner space and extending upwardly from the bottom end face, and a male thread formed on the rim portion. The lower shell half has a top end face, an inner wall, a ring-shaped shoulder projecting into the inner space from the inner wall adjacent to the top end face so that the rim portion is seated against the shoulder, a female thread formed on the inner wall between the top end face and the shoulder and engaging the male thread, and a notch formed in the top end face above the female thread and aligned with the outer recess.

Abstract: A decoration includes a hollow base assembly, a bulb, a sound generating unit, a motor, a mounting ring fixed on the base assembly, several superposed intermediate rotary rings disposed between the mounting ring and the base, and an upper rotary ring disposed on and above the mounting ring. Any adjacent two of the upper rotary ring, the mounting ring, the intermediate rotary rings and the base have a bearing mechanism which includes several circumferentially spaced-apart ball positioning units, and several balls respectively positioned within the ball positioning units. The balls are confined in the ball positioning units so as to facilitate relative rotation between any adjacent two of the upper rotary ring, the mounting ring, the intermediate rotary rings and the base. When the motor is powered, the upper rotary ring and the intermediate rotary rings rotate relative to the base assembly and the mounting ring.