This was a 1st grade project. Using LED wiring 15ft of Red n blue. We used recycle cardboard from socks for the lungs, painted pinkish with light pink highlights, used recycled paper cups n cut the bottom for the 3D affect under the heart for chambers, used clear tubing for the valves which are hot glued to the paper cups. Labels parts n stitched the LED wiring on a black felt. Then applied to a black turtleneck so my son can wear on his body for his speech. The lights have 3 speeds.