How to Build a Waterscope


 

        1. Use a big (No. 10) can with both ends removed.
        2. Put cloth or plastic tape over sharp edges.
        3. Paint inside of can black to improve viewing.
        4. Place a clear plastic bag or wrapper over one end of can.
        5. Secure bag or wrapper with a large rubber band.
        6. Further seal edges with waterproof tape.