When Amelia Bedelia helps out at the school science fair, she finds an exploding volcano, some UFOs, and a mad scientist!

When Amelia Bedelia volunteers to help at a school science fair, she soon becomes the center of chaos. Children willing to suspend disbelief during the episodic story will be rewarded with a few laughs as the amiable mistress of misinterpretation tries to help the children and the judge, a professor improbably named Dinglebatt. After Amelia Bedelia pours too much baking soda into Jason's soda-and vinegar-powered volcano model, it produces an explosion instead of the usual fizzle and drizzle. Using the leaf blower from Wendy's flying-saucer demonstration, she attempts to control the eruption. Instead, she sends Dr. Dinglebatt's hairpiece soaring across the gym. Well designed for young readers and brightened with ink-and-watercolor illustrations, this cheerful book extends the popular series.

"The beloved Amelia Bedelia is back, this time as a helper in the school science fair. Naturally, the literal-minded housekeeper runs into all sorts of misunderstandings, from insisting children are way too young for "makeup" tests, to wondering why Dr. Dinglebatt, the judge, is a mad scientist. Havoc breaks loose when Amelia Bedelia adds too much baking soda to a volcano model, and when the professor's hairpiece falls on a computer, a child screeches, "A rat is attacking the mouse!" As per formula, all ends happily with food and smiles while everyone eats the maid's famous lemon meringue pie. Sweat's familiar watercolor-and-ink illustrations are helpful in understanding the wordplay."
--School Library Journal