Double Marble Puzzle

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Summary Two marbles are snugly fitted inside a curved puzzle base. The challenge is to navigate each marble into its respective hole at either end of the curve. As with most puzzles, there's a twist to this one. To start, print or purchase a curved base in any color you prefer. Make sure the lid is transparent. You'll need five-eighths inch marbles, specifically four of them. Four x seven-sixteenths inch long screws are also required for assembly. This design is an adaptation of the Double Marble Puzzle by tomatoskins on Instructables, a popular platform for DIY projects and tutorials.