For our study on "Investigating Light," one of the books we read was The Very Lonely Firefly by Eric Carle.
After reading the book, we made fingerprint fireflies. Using yellow paint, we made fingerprints on black construction paper. Then, after it dried, we drew in the details. Here is an example of the one I made.
We also took a piece of cardboard and poked holes in it. Then, we turned off the lights and shined a flashlight through the holes to make it look like fireflies lighting up.
The kids really enjoyed this unit, especially when we turned off the lights to make shadows and paint with glow in the dark paint!