Methods:
Use peanut butter as a glue to stick different fruit shapes onto the banana to create your very own creature.
Add a drop of food coloring on the fruit to give it that special color.
For some added treats try using candy (m&m's, Reese's pieces, Gumi's, etc.) You can also use whipcream(lowfat) and raisins.
Make a party of it, invite some friends over and have them bring along one of the add-ons to be used.