Impossible object
thingiverse
It takes 20-30 minutes to finish the printing process. This is a great activity that allows kids to have fun while watching the tubes sliding up and down on the central axis rod.
Download Model from thingiverse
With this file you will be able to print Impossible object 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 Impossible object.