Today we built the Boat Pulley, and learned a bit about power. The kids loved it and had fun. in particular they had fun trying to figure out how to extract more power from it. The topic for Friday is the Wind Turbine, and will be our last use of electrics for a time. Starting Week 5 we will be moving onto Pneumatics. Parents if you could please tell Selena and Derek to stop constantly shouting it would be much appreciated.