A neat end-of-year event is the BYOB. Student Council provides tubs of vanilla ice cream, toppings, and the bowls. All the students and staff have to do is provide the banana. Put them all together in the proper order and you have a sidesplitting event!
This can be of no charge (as long as they BYOB) or you can sell bananas for $1 for those who forget to BTOB’s.