Via the Huffingtonpost - Fred Giovannitti is an industrial equipment inventor, but when he isn't helping to protect the world's marine ecosystems, he colors.

His art is both a professional endeavor -- Giovannitti, who lives in Delaware with his family, owns a tattoo parlor in Las Vegas that he works at ten days out of each month -- and a hobby. In addition to creating unique tattoo designs, the father of two has taken to filling in his kids' drawings with remarkable results.

It all started with a picture Giovannitti's then 4-year-old daughter, Sofia, gave him to take on one of his trips. He explained to HuffPost via e-mail:

My children like to draw me pictures for my trip so I can keep them close to me while I'm away. One day my daughter didn't get around to making me a picture in time, so right before I left she quickly drew me a line drawing to take with me. On my flights to work I keep a sketchbook to draw on the plane and have colored pencils handy. This one particular trip, instead of drawing in my sketchbook, I decided to color in my daughter’s drawing in the manner in which I would color my own work.

And so, a tradition was born... Slowly. As Dad explains on Imgur, a couple months passed before he picked up another drawing from Sofia to work with. After that, his older child, Freddie, wanted in on the action too, and Giovannitti was smart enough to start taking before and after pictures.

The best part about collaborating with his kids? Giovannitti says the bonding time ... and the "AHA moments when they see the finished product."

See more amazing drawings here.