What makes a bubble? Why does it pop? What makes it round? These and a dozen other questions are clearly explained in a brief, readable text in this “Let’s-Read-And-Find-Out” Stage 1 science title. Bradley (Weaver’s Daughter, 2000, etc.), a chemist and a mother of two enthusiastic bubble blowers, is right on target with questions and answers. Explaining that the air inside the soapy skin of a bubble doesn’t push out more in one place or another, she effectively offers a mini–physics lesson. Moving on to demonstrate other liquids, she explains why some bubbles pop easier than others. Clear color photographs help to demonstrate each idea, using a racially mixed group of boys and girls blowing, popping, and examining big and little bubbles in various liquids. The author concludes with a recipe for making bubble solution and additional experiments with bubbles. Young readers (and their parents) will have a good time learning new science thanks to this playful offering. (Nonfiction. 5-8)