Arrange the magnetic pieces by following designs on the included Activity Cards to create a marble run. Do you think you got it right? Drop the marble at the top and see if it can follow the path all the way to the cup at the bottom. Engineering and problem solving have never been this fun! Features endless combinations of designs for multiple levels of learning. Great for building critical thinking skills. Includes 10+ magnetic foam pieces and 10 double-sided Activity Cards. Grades K+.