Everything I know about Norse mythology, I learned from the Mighty Thor comics. Asgard, Odin, Loki, Mjolnir … oh yeah, it’s all there.
If you want your geeky kid to have the same socio-religious education that I did, you may be interested to know that Marvel is developing a Thor cartoon for 2010 release. This will largely coincide with the release of Marvel’s Avengers movie. A Thor live-action feature has also been in development for a long time.
Read more about the ‘toon at Super Hero Hype.