My biggest passion as a child (and pretty high up there as an adult) was Harry Potter. JK Rowling's books brought me a world in which you were valued for your bravery, your cleverness, your daring and your loyalty. A place where it was love, above it all, which conquered. Not to mention the magic.
At the age of ten, I also discovered the joys of the Internet. Namely, the possibility to connect with other children who were as passionate about Harry Potter as I was. The result was the creation of an online Hogwarts, in which one could sign up, be elected into a house, do homework, collect Famous Wizards and Witches cards, play quidditch, shop in Diagon Alley, ask Hagrid for advice, browse the library, and chat with other members. The site was popular for its time, with over 20 000 views, and I fought long and hard to keep my material off other sites (the ultimate copyright hypocrite), but eventually gave up and let it live its own dark and wild life on the world wide web.
There was, as you might imagine, a lot of manual work involved. Activities were sent in via email, and I would go onto the member's page to update their grades, or add new possessions to their profiles (while simultaneously subtracting from their vault in Gringotts, obvs). I did it all with a vigour I now wish I could apply to data entry tasks which I feel slightly less passionate about today.