How thick is moms head?

Today we went to a Bat Mitzvah of our neighbors. We tried to get all sorts of things that they hand out that light up for Jory. They had rings, necklaces, cowboy hats. We were able to get our hands on a light up tamberine. This is not exactly a toy of our choice, but we took what we can get. Jory was playing with me as I was laying on the floor with Mira. She was climbing all over me trying to look at my earrings. Jory takes he tamberine and was pretending to cut all of my hair off with it. He then lays my head on the glowing tamberine, looks at me and then grabs my nose and my chin with both his hands and opens my mouth. As he does this he asks, "Is your mouth lighting up?