What these kids made, the photos on this site..truely one of the best pieces of work I've seen...if you go into the material you get to "PORTRAITS'they painted in anticipation and prep for the project. It blows me away.
I want to teach here.
This experiment can only be done at solar noon twice a year; at the spring and autumnal equinox. These are the two times the sun is directly over the equator. You can do this experiment one or two days before or after the equinox to work around cloudy day