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From Amazon: BUY NOW MaBoRun Mini Marble Run
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MaBoRun Mini III: rolling marbles doing tricks as potential energy of gravity is converted to kinetic energy. In this mini-marble run a battery powered scissor linkage translates the rotation of the motor into linear motion to lift the marbles to the top.
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Similar devices here:
From Amazon: BUY NOW MaBoRun Marble Run
Note: this site contains affiliate links for which I may be compensated
MaBoRun Mini: rolling marbles doing tricks as gravitational potential energy is converted to kinetic energy. A mini marble run with a battery powered means of lifting the marbles via a belt driven gear, and incorporating a simulation of decaying orbits with conservation of angular momentum as the marbles whirl down funnel shaped tracks. Oddly satisfying!