Rainbow in Your Hand

I don't remember when or how exactly I found this little amazing book, but I've had it bookmarked on my computer for a while now. It's still blows my mind as much today as the first time I saw it.

This book started as a personal project of Masashi Kawamura, a Japanese designer in summer 2007, and was soon published from a Japanese bookstore "Utrecht". It's a flipbook, but rather than seeing animation, it creates a 3D rainbow in your hand. It won the NY ADC silver cube. 

Masashi Kawamura is a worthwhile designer to look into. He has more book designs, as well as industrial products, prints, commercials etc. Very entertaining :)