Made with pencils, a pen, a paper clip, rubber bands, spring clips, and a ball bearing, YouTuber rcbif spent his lunch at work creating a useless ‘swing thing’ invention, a concept that he saw online. (Take a close look to see how it’s being powered.) Soon after, he also posted a solar-powered swing thing:

Next: More solar power, more toys, more springs, and another homemade contraption: How To Make A Mini da Vinci Catapult.

via Boing Boing.

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