Want to reuse toys you already have in a new way. Why not challenge your fantasy by making gigantic bridges and ramps with wooden trains (like Brio or IKEA) with help of simple Duplo bricks. These adapters will make this happen!
I got inspired by similar designs on the web, but they were too bulky and often even needed support. I designed this here fully from scratch, since the original (and any others I saw) seemed to be quite excessive on material use and not fully compatible with all rails around. Here are the improvements in my design:
It prints without support and with minimal material settings, since not much strength is required: I used 0.2mm layer height, 2 walls, 5% infill
May 2024 UPDATE:
I overhauled the Duplo base design so it requires no in-build support anymore! Some parts also had an outdated "Brio-pin" design, which was not loosely compatible with other brands - that should be fixed now!
The author marked this model as their own original creation.