Here is a 5 year old homeschooling girl using the Bamboo tablet from Wacom to draw, on the computer.
This video was made using Windows Moviemaker, and the song in the background is..well you should know it by now.
The Bamboo tablet is a great tool for creativity. http://www.wacom.asia/bamboo-tablets/bamboo-pen-and-touch
There is no mess, no environmental cost compared to paper and ink, and we can always undo what we do not want. But you do need electricity. Everything has a cost, but comparatively there are some plus and minuses in this too.
We use Windows Paint or Corel Photopaint to draw.
How is it for you?
Love, power and a sound mind 
Maybe I am old-fashioned. But nothing like paper and ink for me.
very environmentlaly sensitive! 🙂