This student made a model of a house for a Science Fair project and applied his knowledge of circuitry from Science to put in lighting.

Once he had lighting, he wished he had plumbing too but could not immediately see a way to do that. However, one day he had an “Aha!” moment about how to get running water in his house:

“One day I was drinking from a juice box and I squeezed too hard and the juice went everywhere.  I thought I could use that idea for the water in my house.” 

He filled a water bottle about one third full and attached a straw to the cap.  He then attached a tube to the straw. When he squeezed the bottle it would force the water through the tube into the bathtub.  There was a drainage hole in the tub to recycle the water back to the water bottle. His idea was new to him, and had value in the context of his project.