Marble Ball for Lego / Duplo / Hubelino Track

prusaprinters

<p>I created this simple replacement ball for the Lego/Duplo/Hubelino marble run toy systems.</p><p>The ball dimensions should be nearly identical, and you can vary the weight of the ball by including more or less infill, changing how fast the ball rolls.</p><h4>Printing</h4><p>Print at 0.2mm layer height or smaller. No supports required!</p><p>PLA works best, but PETG or ABS would work just fine, too.</p><p>You could even print each of the halves in different colors!</p><p>Use a flat (non-textured) bed sheet so there aren't any gaps when the ball is assembled - you want that mirror-like finish on the bottom.</p><h4>Assembly</h4><p>Recommended glue is fast-drying instant superglue such as Gorilla brand Super Glue (with the blue cap).</p><p>You only need a dab in each peg hole, and just a tiny drop or two along the flat surface. It should NOT leak out the sides when you press it together.</p><p>You can let it sit on a table for 30-60 minutes, or for best results, use a QuickGrip or other quick clamp to clamp the ball tightly together. This ensures the ball won't come apart when the glue cures.</p><p>&nbsp;</p>