Doug Robbins wrote:

You don't need software for this, you can do it with a Sanford Sharpie.

Doug

When I was 3 or 4 years old there was a TV show called Winky Dink. You
could get a vinyl screen that went over the TV tube so whenever Winky
Dink needed something, you could draw it on the screen with a crayon.

http://www.tvparty.com/video7/winkydinkopen.ram

Except that one Saturday morning, my parents didn't have time to put the
vinyl screen in place ...

http://www.tvparty.com/g2/WINKYDINK.ram