An interesting and unusual collection of 3D-crafted designs.
The outer space-themed UFO and Satellite are a pair of Marble Runners that will
whisk away powered up by three of your marbles. Watch the marbles spinning as it
moves like a hovercraft. Works with 5/8” dia. glass marbles (16 mm). See it in action
at the link below. 3D printed at Shapeways.com.