For our Five-in-a-row homeschool co-op recently we read the book Owl Moon. One of our conversation topics afterward was the concept of nocturnal and diurnal animals. My husband suggested that we also talk about the special reflective eyes that God gave night animals. Nova has a good article describing the science of a nocturnal animal's eyes.
I was really tickled to find this lightning bug project from Toddler Approved that provided the inspiration for our art project. For our co-op project I:
1 Printed off a page of nocturnal animal pictures I found on the internet.
2. Gave each child a yellow crayon to color in the animals' eyes (Coloring around the eyes a little is a good idea to make them stand out better) and the word "nocturnal."
3. Allowed the children to paint over the whole picture with dark watercolors. The yellow crayon resists the paint and makes the eyes pop out.