The child is effectively locked into the coloring interface.
While coloring, the interface goes into full-screen mode, preventing accidental button and menu presses.
Choosing colors and line widths is a one-tap operation (the child does not have to know to hit the "Ok" button after selecting a color).

Update Description:
Adds the ability to save as BMP.

***** [Nov 26, 2004] by Mark using iPaq hx4700
Great program - my kids can draw the best wallpapers! The files are saved as .BMP into the Temp folder - I use irfanview to resize to 480x640 for the new wallpapers.

***** [Jul 25, 2003] by Randy using Siemens SX56 - ARM
EXCELLENT!! What a great program. The only way to draw on this device was to use Pocket Word, which sucks for free form drawing. My son loves it (since its the only thing he really likes to do on it...pictures, hangman, tictactoe) and even I find it VERY useful. And...its free! You can't get better than free! It is protective of your kids getting to the rest of your device software and you can change the color and width of the line you are drawing plus the background. Fun & Simple!!