Decagonal Thingy
thingiverse
A shape I experimented with while using Design Something involved constructing a pyramid, removing its top, inserting an upside-down smaller pyramid within the original's interior, then duplicating this form, inverting it, and positioning it on the base. The instructions may be confusing.
Download Model from thingiverse
With this file you will be able to print Decagonal Thingy 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 Decagonal Thingy.