Mr. Magoo heads to a used car lot hoping to buy Waldo a new car for his birthday promising Waldo, "I'll be back with a little surprise for you". The crooked car salesman notices how myopic Magoo is and takes advantage of it by over-pricing the car Magoo chooses. Magoo accepts but the car salesman gets his just desserts when he unwittingly goes for a harrowing test drive with Magoo taking him to an amusement park where Magoo leads the car to the top of roller coasters and ferris wheels among other things with a police officer in hot pursuit.

Mr. Magoo's dog is threatened by the dog catcher (who Magoo takes for a policeman). He's given until noon to license it. As he's preparing to leave, a circus goes by; he hitches a ride in a clown car (thinking it's a taxi) and, after a digress through the big top and into the gorilla cage (mayor's office), he ends up in the panther cage. He thinks the panther is his dog, and that he's been captured by the dog catcher, so he slips on the collar and takes it home. When Magoo gets home, the dogcatcher is waiting for him, but at the sight of the panther, he gives Magoo the license and traps the panther under a washtub. As the circus people cart it away, Magoo slips the license onto his tigerskin rug's head.

Mr. Magoo is hired by his neighbors to babysit their little son, Homer. Magoo is delighted to accept but, unfortunately, a notorious cat burglar is intent on entering and robbing the house Magoo is babysitting it. To make matters worse, Magoo is constantly confusing Homer with the family dog and vice versa. When the thief finally breaks in, all chaos breaks loose but everything turns out all right in the end when the thief is apprehended thanks to the dog who is more alert than Magoo was.

Magoo's at a Rutgers alumni dance and winds up squaring off with a pro wrestler at the arena across the alley, thinking he's dancing with the wife of an old friend.

The near-sighted, and obviously rich, Mr. MaGoo and his nephew, Waldo, set sail on their well-rigged boat to catch Mighty Moe, the elusive giant marlin. Walso falls overboard and Magoo rescues a seal by mistake. Thinking he is giving brandy to Waldo, Magoo serves the seal with cod-liver oil, making the seal very happy. MaGoon ties the cod-liver oil to the anchor, sinks it and promptly catches Mighty Moe. He then sails for port with his prize catch, leaving Waldo, at sea, hanging onto a buoy.