Rube Goldberg Machines - Favorite Voted on by the Girls!

The girls were shown examples of Rube Goldberg machines from online and then put into pairs and given a task for their own machine.  The girls were told to ring 6 jingle bells and have at least 4 start/stops, where one ball triggers another.  Each pair was given a combination of bouncy balls, marbles, and ping-pong balls.  After working for a while, they all watched each others and said something they liked about it and one suggestion they had.