Print these in flexible filament for the "flappy effect". This is a fun way to use up some extra ninjaflex you may have laying around the shop. Kids love to flap these cute finger toys. The lower the Shore Hardness i.e. Ninjaflex = 85A verses Cheetah= 95A the flappier the wings will be. The butterflies with the wider wingspans flat the best.
My mother loved Flappy Bat and suggested I make some flappy butterflies.
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 goto 3dprintny.com