The animals can't imagine what on earth Percy is doing in the workshop, but he's certainly making a great deal of noise. Percy's invention is an engine-powered lawn mower to help him get all the grass in the park cut quickly. The animals climb on board to help him try it out and are very impressed when a stripe of beautifully-mown grass appears behind the machine.
But when Percy tires going a little faster, the machine suddenly takes off! Fortunately for the park keeper and his friends there are some woolly helpers on hand to make sure they get a soft landing.
