Finger Slinger
thingiverse
Originally intended to be a tool that enables one to bind your hair together with only one hand it failed miserably, but since it doubles and triples as a finger trainer and a slingshot I'll still put it here. edit: On suggestion by Cameron renamed from ‘Cool Finger Cup Tool’ to ‘Finger Slinger’ Instructions Adjust for your fingers sizes, print a couple of them and use them in some creative way.
Download Model from thingiverse
With this file you will be able to print Finger Slinger 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 Finger Slinger.