Mr. Happy is a very happy sort of a person and wishes for everyone to be happy. When he is out for his walk in the woods, he meets Mr. Grumble, who is fishing and grumbling. Mr. Happy asks why he is doing this. Mr. Grumble responds by saying that he needs something to do as a hobby. Mr. Happy offers to help out finding Mr. Grumble a hobby he likes doing.
They meet Mr. Rush who likes to go fast in his car, but Mr. Grumble hates going fast. Then they meet Little Miss Giggles who loves giggling! They go to the circus to see the clowns, but Mr. Grumble doesn't find them funny. Then they try on fancy hats with Little Miss Splendid, play practical jokes with Mr. Mischief, bounce with Mr. Bounce, and look through keyholes with Mr. Nosey, but try as they might, they cannot find a hobby! After a long day of not finding a hobby, Mr. Happy meets Mr. Impossible who asks his advice for the best hobby for Mr. Grumble. Mr. Impossible says it would be impossible, and Mr. Grumble storms off home.
The next day, Mr. Happy had finally got an idea! He runs off to see Mr. Grumble and tells him to take up fishing as a hobby, and what does Mr. Grumble do best? He enjoys grumbling! And that makes him happy!
