"At the Exploratorium, we dissect cow eyes to show people how an eye functions, and look at the parts that make up an eye. In this video, one of our staff Explainers demonstrates a cow eye dissection."
"It is 4 posters for your class. The first is a Cows Moo Softly poster which I use as a reminder for variables which change, stay the same and are measured/observed when we are conducting fair tests."