My 9th graders are creating Rube Goldberg Machines (https://www.youtube.com/watch?v=qybUFnY7Y8w) and will be presenting them next Thursday the 18th from 1:15-1:50 in the Multi-Purpose room. You and your class are invited to come. They will be teaching whoever comes about the simple machines they used to create their larger complex Rube Goldberg type machine.
Please let me know ahead of time though. There is only enough room for one class at a time.