Left to His Own Devices

Matt enjoys playing with his Aquadoodle. For those that don't know what this is, it's a white mat that changes colors when written on with a 'water' pen. The pen holds water and is transferred to the mat when you write/draw on it. Yesterday while Matthew was playing with it, he ran out of water in the pen. He then attempted to refill the pen from the sink but had no luck. So what did he do? He took matters into his own hands. He peed on it.

P.S. And it worked!