"This timely book will prove useful for home-based lessons in science, math, and, of course, baking" - Kirkus Reviews Cora promises to keep Uncle JB's Bread Pet alive but didn't anticipate its exponential growth! She needs to come up with a solution -- and fast! This whimsical STEM story of family, creativity and community will inspire young makers to experiment and share their gifts with others. Includes recipes for sourdough starter and sourdough bread.