Spacewarp (toy)
Spacewarp is line of build-it-yourself toy rolling ball "roller coasters" first made in the 1980s. Users cut lengths of track to the correct size from a single roll of thick plastic tubing, forming curves and loops held in place by plastic track rail holders which attach to metal rods held vertical in a black plastic base. Steel balls roll around the track and on to a battery-powered Screw conveyor that takes them to the top to start all over again.
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