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Codex Silenda - puzzle book

Brady Whitney: Codex Silenda - puzzle book, must solve puzzle to turn each page

A crank is turned moving marbles to the top then they travel down two pathways

This is another leading seller. The Bell Tower Marble Machine is based on the bell towers of Italy. A unique wood crank elevates marbles up through an acrylic tube to the tower’s loft to ring a bell.