Louisa Wise and her family have a great band down under in Australia. She kindly sent me her CD "This Blue World", and the main song is inspired by "Sophie's World":
A song of hope, the Big Bang and its rewind, inspired by Jostein Gaarder's book Sophie's World. The ruts/lines concept I also read somewhere (2 inch book of thoughts for the 90's woman displayed in trendy bookshop next to the cash register)

Listen to it:
Excerpt from "This Blue World" (MP3, mono, 602KB)
"This Blue World" (MP3, stereo, 5.3MB)

If anyone knows how to contact Mr. Gaarder, please let me know, because Louisa would like to send him a copy of her CD.

In 1999, there was a Scandinavian film called "Sofies verden". If you have seen it, you can discuss it on IMDB's message boards.

Or if you speak Danish, you can visit the official web site.

A board game exists which leads you (and up to 5 other players) to a quest for knowledge, visiting key eras of history.

There is also a highly acclaimed CD-ROM (for Windows) which lets you explore over 200 environments and communicate with philosophers on screen. It also contains challenges and puzzles as well as a reference of philosophy.

(Thanks to Nastaran Kuku)