Marble run blocks plans See the specs See what's

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Marble run blocks plans See the specs See what'sThese marble run blocks are designed to build a variety of marble runs. Unlike most set of marble run blocks you can buy, these blocks include a "pumping unit" that raises marbles at the push of a lever. Also, these blocks are designed to use as little vertical height per block as possible, so that you can make longer runs without getting too tall. I originally designed this toy for a toy company, but it appears the toy company has lost interest, so

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