Put your engineering skills to the test with this DIY 3D Puzzle Marble Run! Featuring laser-cut pieces, you'll have your night city built with 294 wooden blocks in no time. But don't think it's a piece of cake - our puzzle's not for the faint of heart. So buckle up and try your hand at this challenge that's suitable for the bravest of builders above 14! And who knows, maybe you'll surprise yourself!
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