Bringing Open Source To The Classroom
narzy writes "I have written a limited research paper outlining the challenges of bringing Open Source software in to the educational environment. I also look briefly at the differing development views and security principals of the closed and open source communities, how we can overcome some of the challenges of implementation as well as what it would take to create a vibrant learning environment using an open source architecture."
New Breed Software makes a lot of good open source edutainment applications. I know TuxPaint is part of Debian Jr. Not sure about the others like Tux Math, but you might want to check it out.
Famous Last Words: "hmm...wikipedia says it's edible"