After hearing about the annual boxcar derby, George enlists the help of his friend Allie to build a car, learning about simple physics and the parts of a car in the process of trying to win the race.
George and the Man with the Yellow Hat help their friends Marco and Cecilia prepare a party for their mom, but when she arrives early, the party-planners have to scramble to make a Mother's Day she'll never forget.
While spending time in the country during Halloween, George is spooked by the legend of "No Noggin," a headless scarecrow that kicks people's hats off.