Book curses were a regular feature in books and libraries during the medieval period, when the hand-written manuscripts were considered extremely valuable and therefore irresistible to thieves. This particular curse is in fact a hoax from the 20th century, but there are a few more examples of the kinds of things that scribes and librarians wished on their enemies here.
Alice in Wonderland, by Lewis Carroll, is the tale of a little girl's adventures in a strange fantasy world. Here, Meggie is referring to the number of times that Alice eats and drinks things which shrink her, or make her grow much larger than usual. Here's a montage of all these scenes, from the Disney adaptation of the story.
Juggling is a great hobby and can apparently even improve your brain power- why not learn to do it yourself?
Fire eating is a fascinating and dangerous form of entertainment which is still performed by people today, although few fire eaters can claim to be quite as in-tune with the fire that they perform with as Dustfinger is. For a brief history and demonstration of modern day fire eating, here's a video with some of the basics in.