I need to make a toy which represents gravitational potential energy converting to kinetic.?

What toy can I make to get a good grade on this assignment?I need to make a toy which represents gravitational potential energy converting to kinetic.?
many toys convert gravitational potential to kinetic



HOT WHEELS on a track where you let it drop down the track and through the loop lower down



then there is a pendulum that was used for clocks to keep time



then there is the http://en.wikipedia.org/wiki/Newton%27s_…



its a cool effect



hope that helps you get some ideasI need to make a toy which represents gravitational potential energy converting to kinetic.?
Its simple the best example for conversion of kinetic energy in to potential energy is with a pulley and a bucket.lift the bucket up and leave it then it falls down rapidly.Tats the conversion of PE to kE.I need to make a toy which represents gravitational potential energy converting to kinetic.?
Create a pendulum toy or one of those old fashiong toys where you have to catch the sphere in teh dish, PE and KE are persistantly interchaning in these toys
Well obviously not very creative but your last resort can be a pendulum. Try to spice up a pendulum with your own little twist.