Butter-Fly Flippers!
thingiverse
See these in action on my Instagram https://www.instagram.com/p/CwGkvz0hIu2/ Butter-Fly Flippers are great butterfly toys for kids and fun. They are great pranks for kids as well! Put inside a book or box. When it opens they start flapping around. They are a very fast print, very thin. You will need a rubber band and I personally suggest using a paper clip or if you have it, piano wire to make a hook to put the rubber band in. You want a thicker smaller rubber band with a lot of strength to store more energy for the flipping. They are a ton of fun.
With this file you will be able to print Butter-Fly Flippers! 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 Butter-Fly Flippers! .