Brief description: Treats are frozen into water balloons to make a large egg shaped ice ball. Chimpanzees will enjoy both the ice and the treats frozen inside.
Materials: Balloons in a variety of sizes
Assembly instructions: None required
How to use: Fill balloons with fruit, diluted juice, tea, etc and add water until they have expanded into a manageable size. Tie them off at the end and freeze. When completely frozen, run them under water for a few seconds and cut the balloons off (dispose of balloon). You should be left with an ice sphere.
Price: A package of balloons can be purchased at the dollar store.