This trick is fun and simple! Just pick up some of that gel shaving cream when you are grocery shopping. When you get home, stick it in your freezer. Now it's time to choose the victim. Think of a place that would be funny to fill with shaving cream (locker, tub, drawer, etc.). Saw the can in half and stick it in the hiding place. Allow time for the shaving cream to melt. When it is completely melted, the hiding spot will be FILLED with shaving cream. A friend of mine tried this in her family's bathtub and it was completely FILLED with shaving cream!