Rube Goldburg machine

L.I:To apply knowledge of simple machines to create a Rube Goldberg machine. Our challenge was to make a simple Rube Goldberg machine using  all the six simple machines.The simple machines we used for our Rube Goldberg machine is a pulley, wedge, incline plane, wheel & axle and a lever.The challenging part is what are we going to make and what we are going to use for our simple machines.The part that I will make different is the pulley part.I want to change and get a better pulley.The material I will use for the pulley is a yo-yo.