It’s springtime again in Deanville and everything is in full bloom—including some microscopic nuisances that put a damper on outdoor activities. What could it be? Help Jesse use science skills to figure it out! Ten-year-old Jesse Steam’s curiosity about how the world works leads her to one mystery after another as she pedals around town with Mr. Stubbs, her tabby cat, keeping her company in the bike basket. Using simple scientific tools and their powers of observation, Jesse and her friends analyze, test hypotheses, and conduct experiments. If the kids get stuck, they know they can count on Professor Peach, a retired science educator, to step in with a clear explanation.