I needed a Duplo compatible brick with knobs at the front. Reason: I have Duplo plates on the wall and wanted to change building direction, to build upwards.

The brick is based on one of someone else including some modifications. But I can't see by who. Thank you!

I created different sizes of this special brick. It works reasonably fine for me and my tinker son. We are using it to create creative Hubelino/Duplo powered marvel runs. Suggestions for improvements are very welcome.

Print with supports below the knobs.

This object was made in Tinkercad. Edit it online https://www.tinkercad.com/things/2ciaLNcbVmf