This guy's mechanized paper sculptures are pretty incredible

"I like to design complex paper sculptures by combining mechanisms," says Paul DeGraaf.

They're absolutely amazing! A playable electronic keyboard!

Courtesy Paul DeGraaf

Here's a couple of wonderful IMGUR galleries where Paul showcases his absolutely beautiful mechanized papercraft sculptures: Part One, and Two.

From Paul:

I like to work with paper and create mechanisms that are complex. It's lots of fun and there's a lot of problem solving involved. Some may think it boring or a waste of time but for me it's like playing with paper LEGO.

Just incredible.

Here's gallery part one:

My weird hobby

Here's gallery number two.

My weird hobby part II