Rattle
thingiverse
I remixed the cat toy as a baby rattle. The little icosahedron makes a good deal of noise. I've dropped them in during printing after each ball is at least half-done.
Download Model from thingiverse
With this file you will be able to print Rattle 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 Rattle.