?

“What do you do?”

“I use light to learn about molecules.”

“What does molecules mean?”

“They're tiny little things that make big things, like you and me.”

“How did the sky get blue?”

“Sun gets that color when there's air to move through.”

“Why do mommies have to run in shirts?”

“Mommies and daddies are different. If they run without, it hurts.”

“Where do babies come from?”

“Oh, well, uhh, ummm,”