Hi Lisa! Thanks for your questions. In this unit (Vehicles In Motion) the kids will build Coaster…Read More Cars and test different aspects of the motion of their vehicles such as: distance traveled, acceleration, straightness, and friction. This unit emphasizes student collaboration in order to develop a set of performance test procedures for measuring Coaster Car performance. An incoming sixth grader can definitely join! Feel free to call the number above - my co-worker will be happy to help you.