Natalie and I were working on a scientific art project:
We put a hollow area inside it and filled it with baking soda. The trunk has a straw inside it. We were going to put vinegar into the trunk and have the elephant sprout "water". We tried it, but the vinegar must not have reach the baking soda, or maybe we put too little in, because it didn't really work. But we sure had so much fun making it!