We are talking about teeth!
Here's a silly pop-up book, that asks you to brush various animals' teeth. I choose one child a day to do the brushing for me. We read it every day. I also painted the bottom portion of an egg carton to simulate teeth and how to use small circles when brushing.
Each child will add a tooth (3" long tooth cut-out), if they brushed their teeth that morning.
In our journals, we will write about the purpose of teeth. Teeth help us speak and they bite, tear, and chew food.
Here is our project in art center. The children color the giant lips, then use paint and a toothbrush to brush in small circles across the teeth.