Abacus
thingiverse
Create an abacus, perfect for teaching kids basic arithmetic and advanced techniques. While I've only used Shapeways without a 3D printer, fingers crossed for a proper fit. Following examples, design your own beads, pegs, and body. Some assembly required: print one set of pegs and the body, then insert each peg and bead accordingly. For a permanent display, consider using super glue on the pegs.
Download Model from thingiverse
With this file you will be able to print Abacus 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 Abacus.