http://obviousfun.com/wp-content/upl...-things-22.gif
http://obviousfun.com/wp-content/upl...xplanation.gif2. Working of a pill press1. Working of sewing machine
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http://obviousfun.com/wp-content/upl...day-things.gif 3. How a zipper works
http://obviousfun.com/wp-content/upl...day-things.gif4. Working of a radial engine
http://obviousfun.com/wp-content/upl...-explained.gif5. Working of alpha Stirling engine
http://obviousfun.com/wp-content/upl...-explained.gif6. Working of a Geneva Drive
http://obviousfun.com/wp-content/upl..._they_work.gif7. How to make a Hypotrochoid
http://obviousfun.com/wp-content/upl...-in-simple.gif8. Working of a locomotive
http://obviousfun.com/wp-content/upl...gs-working.gif9. That’s how we get pi
http://obviousfun.com/wp-content/upl...hings_work.gif10. How to draw a yin yang symbol