This is an add-on to any event, but works great with a “Banana” Themed event, and works best in the summer months. What you need, is a whole ton of ice cream (depends on the size of your group), a ton of plastic spoons, bananas (pre sliced), all the toppings, and an eavestrough.
An eavestrough can be found in any large hardware store, and the size will depend on the size of your group.
Our group used a 10′ trough for 20 people, but I’ve also seen a 50′ length trough for close to 100 people (approx 6″ per person). The youth have a blast seeing that large a banana split, but also the fact that they’re eating out of a gutter.
*note* I suggest cleaning out the gutter prior to filling it with ice cream!