When the magic wind turns fourth-grader Katie into her friend George, who has been playing practical jokes to liven up their school, she has to figure out how to get him out of trouble and sooth everyone's hurt feelings.

Katie and her friend George try to spice up the school day by playing a few practical jokes. Using a special kit full of whoopee cushions, pepper gum, and a water-spraying camera, the two kids make a splash pulling off gag after gag. But then Katie turns into George—just as he gets blamed for all the trouble! How will Katie get out of this one?

Katie and her friend George try to spice up the school day by playing a few practical jokes. Using a special kit full of whoopee cushions, pepper gum, and a water-spraying camera, the two kids make a splash pulling off gag after gag. But then Katie turns into George—just as he gets blamed for all the trouble! How will Katie get out of this one?