This easy print was designed to be made with flexible filament for some Halloween fun. Use them as party favors. It hardly uses any filament to print. One bat has longer slits to accommodate bigger fingers.
Check out the hanging decoration version Flying Flappy Bat which can be printed out of PLA.
I create these designs to encourage people to try out flexible filaments or get some new interesting colors of flexibles. For info on purchasing samples of several brands of flexible filament, TPU for as little as $1.99 per sample see 3dprintny.com