Stackable block mold
thingiverse
This is still a work in progress. I should have it printed and tested shortly. There are several cardboard and paper recycling projects but this should be one you can stack multiple blocks like Legos.
Download Model from thingiverse
With this file you will be able to print Stackable block mold 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 Stackable block mold.