Just a quick update to let everyone know that I have updated the Whiteboard demo application.  I added a few options to make it more interesting to use!  I showed it to the kids and they loved it (even though they kept asking ME to draw pictures for them)!
 

Here is a list of available options:

1. Color Picker for line color
2. Slider for line thickness
3. Save to XML file
4. Open saved drawing
5. Clear whiteboard
6. Hold down ESC key to erase

And here is a screenshot of my beautiful artwork! :)

So what are you waiting for?  Go play with the Live Demo (and be sure to share with the kids) or download the source code.

Enjoy!