If you haven't done so yet, take a look at the National Gallery of Art (Washington, USA) interactive online Art Zone you should take some time to do so!   

There are currently sixteen applications that allow learners to create beautiful artwork that can then be printed or even animated!

Note: Adobe Shockwave Player is needed to use these applications. 

I recommend that if you can, take the time to investigate the creative options for each application (I've spent more time than perhaps I should have done already!).  For example in the Faces and Places application, once the items in your painting have been added, they can be arranged within the portrait by click-n-drag.

To take a closer look visit http://www.nga.gov/kids/zone/zone.htm.