Hypno ring-a-thing
youmagine
My kiddos were hooked on hypnotic rings just like the ones in their favorite Captain Underpants books. They even created colorful illustrations to go along with it, so I happily obliged. Plus, I printed up a few extra copies that I listed for sale on Etsy. You can print this out and get the small ring attachment (size 5 works best for most kids) from Youmagine here: https://www.youmagine.com/designs/stubby-sized-ring-a-thing. Then hold it up in front of your school principal and command, "You will obey my every command! Whenever you hear a finger snap, you'll transform into Captain Underpants." The adventures are endless.
With this file you will be able to print Hypno ring-a-thing 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 Hypno ring-a-thing.