Good Night, Firefly by Gabriel Alborozo.
This is such a sweet book!
Nina's electricity goes out and she captures a firefly to help her see. As Nina and the firefly play, the firefly's light grows dimmer and dimmer. After trying to help her firefly in a few different ways, Nina realizes what she must do.
When I read this book, we sing one of my favorite Firefly songs every few pages (when she finds the fireflies, when she is reading by the fireflies light, and then at the end a few times as well).
After reading the book, I have students do simple movement to Fireflies by Owl City. This time, I did not use finger lights, as we still are working on movement expectations, but this movement would look awesome in the dark! It is purposefully very simple so it is accessible even to my new kinders. Unfortunately, the movement video is too large to embed into this post directly, but you can check out the movement here. Feel free to change it up a bit, add in more cross-body motions, turns, or even locomotor movement to make it work for your students.