While doing spring cleaning in her room, Jesse comes across a crayon on her window sill that is curiously bent over. She recalls that the crayon was there all winter and not bent at all. Jesse begins to wonder what caused the crayon to bend. Using science skills, Jesse discovers how the Sun is closest to Earth in summer and that's why the crayon melted. Ten-year-old Jesse Steam's curiosity about how the world works leads her to one mystery after another as she pedals around town, often 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 college science educator, to step in with a clear explanation. Jesse STEAM Mysteries promote STEM and STEAM concepts for young children.