Marble Run V1

Due to the risk of accidental ingestion by children under three years old with 14mm ball bearings, this 25mm ball bearing track has been specially designed for 20-25mm ball bearings, which can be made of glass or solid plastic balls. For children, hands-on exploration is the greatest pleasure, so there is no electric version designed. Other versions will add electric versions in the future. The disc with text can be printed in two colors (print the text first, then print the disc), remember to set the Z lift to 1mm.Please make sure you are using countersunk screws, otherwise the track will not be smooth.If you don't want to prepare multiple screws, except for the longest one, you can use m3 × 10mm screws for all others.Due to printing gaps and tolerances, in order to ensure that the purchased screw length is always usable, a slightly longer size of m3 × 50mm can be purchased.Suitable for solid ball bearings larger than 20mm, those smaller than this size may not run smoothly. The fo