One thing that I truly love about my iPad is the Doodlebuddy App.
I can spend hours using my fingers to make lines, smudge colors, create impressionistic art and let creative energy literally pass from my fingertips to the canvas without so much as getting one drop of paint or streak of marker on me. I have never been a neat person when it come to coloring and somehow always ended up with more color on me than the paper. Doodlebuddy allows me to spend an afternoon in a coffeeshop coloring without having to worry that I will meet someone with marker all over my face.
I believe this App is also on the iPhone too. What better way to pass time in a doctor's office or on the bus than coloring?
Also, Dear Rainman, I miss you.