This is near unexplainable. The cool meter just busted mercury all over iPhone owners’ faces. 

What could get Mask Masher so excited to run his fingers carefully over his pocket glass? Crayon Physics, the iPhone App that takes your childhood and hands it to you like never before. Drawing lines with your finger on screen in pre-set scenarios, your bridges and boulders and the like come to life creating living worlds in an instant.

Anyone who ever read Harold and his Purple Crayon in their youth will likely shed tears of joy.

Watch the video till the end, it gets wild.