I have 3 year old twins. They watch me draw. Of course, they
want to do what daddy is doing. So, when daddy is in the bathroom, they grab a permanent marker (which was just right there on the desk) and express themselves all over my stuff.
Now, the tablet and the keyboard didn't really bother me. They're just plastic and it will come off. My biggest concern was the monitor. But, thanks to this stuff:
It now looks like this: TA-DA!
Everything turned out good in the end. So, for those illustrators out there who are debating on whether or not to have kids: Sure, crazy stuff happens, but you can fix it. Go have some kids.