Add the desired amount of baking soda to a sensory bin or container. Then, slowly mix in shaving cream. I used one large box of baking soda and almost a full can of shaving foam. As you slowly mix in the shaving cream you will discover a fantastic mold-able snow. The snow is super soft, silky smooth, and smells so clean and fresh. It is also naturally cold. I am not sure why exactly but it is! It feels just like fresh fallen powder in your hands.