In this photo you can see that there are all types of taps and shower heads. The students use these to find out which type is most water efficient. They can turn them on and see for themselves. It is a very good strategy for learning. All of this is inside the trailer and students go in and experiement and discuss ideas with the teacher.
I think that if people themselves can find out things about electricity and water it is probably easier to take it seriously and remember.
SvaraRadera