"How that works?"

HG has a cloth book about farm animals, with a built-in speaker. You press on the animal, it plays the animal sound. Each page has at least one sound button hidden inside the cloth page.

She was playing with it today when she looked up and asked, "How that works?"

Good question, no? Ima said something about circuitry and electronics. HG patiently asked her to explain it again so she could understand. She kept pressing the buttons and asking for explanations, apparently determined to figure it out for herself.