<blockquote>quote:</font><hr>3. If the kids meet the school wide goal, we are going to decorate the main hall like a jungle and our principle is going to do something special, we don't know what yet.<hr></blockquote>
Two ideas pop into my head immediately. One fun. One
EVIL!
Fun: Have the principal dress up in a gorilla costume and do...something. Dance on a table in the cafeteria. Direct traffic in front of the school. There are lots of possibilities.
Evil: The blindfolded banana eating contest. Have an assembly in which the principal, maybe a teacher, maybe a representative from the two or three oldest classes, have a banana eating contest. However, to add a little bit of challenge, they have to wear blindfolds while they eat the bananas -- four or five bananas is a good number. On the signal to begin eating, remove the blindfolds from every contestant except the principal.
Sounds like you've got a great reading program lined up, with lots of incentives to draw in even the kids who don't like to read. Let us know how it all turns out!