Here the boys were challenged to spin the different sized discs on a spinning metal wheel. It was very hard, but they had a great time trying. Also, McKay learned here about kinetic energy by pedaling to spin this giant wheel. Once he got it spinning it continued for a long time. They also got to watch a giant hot air balloon rise and fall, a robot made of metal tinkering pieces and simple wires talk and move, played some instruments, learn how the body digests food, see what parts of the brain control what parts of our bodies, etc. McKay told us it was one of the best days of his life. It really was great!