Random pair interp is always fun. Or you can get a team together and let each skater do one element from their level either against the book or against eachother.
I like the pair interp event because if you do random partner assignment it often comes out to be really good and/or funny.
A bunny hop race the length of the ice is good, too.
At the rink. Again.
There's always the spiral, jump, spin competition where the length of your spiral, the distance of your jump are added together with the number of revs in your spin to determine a winner
Just for on ice fun, I've seen the kids doing the best "opposite" jump contest and something to do with adding elements. The first skater starts with one element, then the next skater has to that one, plus add their own and so on.
For a club competition, surprise showcase is fun. Skaters listen to the cut of music, then are taken out of the rink to wait their turn. One skater at a time comes in and skates an interpretive program to the music. Lots of fun and teaches the skaters to really listen to the music.
Wicked Yankee Girl
How far you can go in a single shoot the duck can be fun for beginners, particularly when you have to go round the end of the rink.