Duplo train joint
thingiverse
You can link up multiple Duplo trains together by attaching the special joint to the front of one wagon and then connecting it to another wagon, allowing your train to grow as long as you want it to be.
Download Model from thingiverse
With this file you will be able to print Duplo train joint with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Duplo train joint.