Here's a no mess painting tutorial. To follow this you will need Photoshop CS5, and it helps to have a Wacom graphics tablet. (like a mouse pad with a pen instead of a mouse)

This is a beginning level Photoshop tutorial, and should be appropriate for "kids of all ages." Have fun!

Here's a copyright friendly photo, taken by me to use for practice. Click on the link to download.
4shared.com/photo/tjeYEHwp/pigeonpointsunset.html

For more information on how to do frame by frame digital painting, see a couple of my other Photoshop for Kids tutorials.
Rotoscoping Made Easy
vimeo.com/14573273
and
Video Art: Adding filters to video
vimeo.com/10934139

Also, be sure to see more of my other tutorials and find many other great Adobe resources for teachers at the Adobe Education Exchange.

edexchange.adobe.com/pages/home

Music used in this tutorial:
"The Place That Won't Take Me Back" by "I am Not Left-handed."