Abstract: A toy that makes use of conventional garden hose or similar flexible tubing to form a rolling track for marbles. The toy includes a number of supports that function to hold the hoses in longitudinal contact at desired height and angular relationships to the supporting surface, thereby defining the course along which a marble will roll. Height may be adjusted by adding or removing lengths of upright supports. Angular "banking" of the track is accomplished by angular positioning clamp members that mount the track to the supports.