Bursting Bubbles: The Story of an Improved Investigation is a realistic fictional account of two kids designing an investigation.
As Daisy and Pablo investigate yeast, sugar, and different temperatures of water, they make a series of mistakes. Each time they notice a mistake, they make their investigation a little better.
This book models how to plan, carry out, and communicate about an investigation. It highlights common points of difficulty in the investigation process, such as controlling variables, making comparisons, taking measurements, and making explanations.