Since purchasing my graphics tablet I've been treated on a regular basis to, "Dad can I draw on your computer? Dad can I draw on your computer? DAD! Can I draw on your computer???"
They finally broke me down this weekend and I let them have a try at it. Older-by-two-minutes daughter took to it like a duck to water and was turning out art very similar to what she does with physical medium.
Christy pointed out the, "I WILL KILL YOU!" look on the face of the guy in green. (That's Link from The Legend of Zelda. I'm not sure if it's Ocarina of Time or Twilight Princess Link)
Slightly-younger daughter had a much more difficult time, scribbling violently as I winced on, that eventually ended in tears. I let her know most people find it difficult to adjust to using the tablet and that she could try again another time. The explanation seemed to satisfy her frustration; that or she was immediately distracted by her legos.