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Turn your Mega Marble Run creation into a hard-working machine of endless fun with the easy-to-add marble elevator. The adjustable chain works with short structures or marble runs that stretch to the sky. The sturdy base and marble loader connect easily to other marble run pieces. This expansion kit also includes two marble-catching bases to add sturdy support to your structure as well as a roller rail spiral and a ricochet ramp. Motor uses two AA batteries (sold separately).