Step 7: Setting up the prank

Swivel the top wings around and around till the rubber band is as twisted as possible, then slip it into a book and close it quickly. When an unsuspecting reader opens the book your butterfly will flutter out!

See, <a href="http://www.instructables.com/id/Rubber-band-Powered-Butterfly/" rel="nofollow">I knew these worked</a>!
I'm so impressed you managed to make this work with paperclips! I got so frustrated trying... I wish I had seen your instructable before... Still, I don't regret doing it with a 3D printer, it was a good pretext to try out the technology. I'll be sure to include a link to your instructable on my next update.
Cool, thanks.
Yup, the rubber band and paperclip one's work great!
I would love to see a kid react to this! Very fancy!
I wanted to do the same thing -- but my kids know all about it and it's very hard getting a spontaneous reaction when you hand a book to a kid and train a video camera on them: most of them will become pretty suspicious.

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Bio: I am a paper engineer, writer, maker and chemist wannabe. In addition to pop-up cards I design and build furniture, lights, costumes or whatever I ... More »
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