![How I Designed a Marble Pump - 3D-printable and Lego Compatible : 5 Steps (with Pictures) - Instructables How I Designed a Marble Pump - 3D-printable and Lego Compatible : 5 Steps (with Pictures) - Instructables](https://content.instructables.com/FBJ/G67C/J8YR840L/FBJG67CJ8YR840L.jpg?auto=webp)
How I Designed a Marble Pump - 3D-printable and Lego Compatible : 5 Steps (with Pictures) - Instructables
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Lego Duplo and Hubelino marble tracktor, not the most elegant build, a lot of track is hidden on the inside. Unfortunatly it didn't l… | Lego duplo, Kugelbahn, Lego
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