The video: Woof

1. First, we drop a marble into the slanted shelves. Then once the marble goes from shelf to shelf, it drops into the cup attached to a lever. the side of the cup then goes down and hits the bell, making a sound, while the other side raises and releases another marble. The second marble goes through a tube then hits dominoes which then hits the treat. The treat falls on the ground by the dog and now the lucky dog has a treat to munch on.
2. The beginning, when the marble is placed and starts to move down, is potential to kinetic. When the moving marble falls into the cup it’s kinetic to potential. The cup hitting the bell is motion to sound. The marble released from the lever is potential (stored) to kinetic. Lastly, when the dominoes and the dog treat get hit by a moving object it’s potential to kinetic.