Let me show you how to make a melting snowman experiment that is both simple and festive. The first step is to mix one glass of baking soda with 1 tbsp of salt, 2 tbsp of hand wash and 4 tbsp of water. Next, mould three balls and stack them. Then decorate the snowman with paint, twigs and a paper nose. Finally, use a pipette to add vinegar to the snowman and observe as it slowly melts.