If you suddenly wanted to see a rainbow it would be really problematic - not only you'd have to wait for the rain to come, but there should also be a sun shining through the falling raindrops.
Luckily, now there is this cool rainbow creating book! It's a flip-book, but rather than seeing animation, it creates a 3D rainbow in your hand.
"Rainbow In Your Hand" started as a personal project for designer Masashi Kawamura in summer 2007 and was soon published from a Japanese bookstore "Utrecht". Since being published it has been featured on Japanese TV, newspapers, major news and blogsites like yahoo news, coolhunting, fffffound, and now on Bored Panda. This book also won this year's NY ADC silver cube. (via 1 2)
Just be sure not to flip it too much, as others might think you are sending some kind of secret rainbow signals to them.
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