Kermit gets invited to a birthday party at the amusement park, but it's two weeks away so the babies decide to make their own fun parks in the meantime.
When the Muppets get their sport jerseys back from the laundry, Gonzo's is too large and he worries he's shrinking, while Fozzie's is too tight and he fears he'll become a giant.
The cookie jar in the kitchen is broken and Gonzo quickly becomes the prime suspect; so Scooter decides they should give him a fair trial to determine his innocence or guilt.
After the Babies accidentally spill jelly all over the hallway. Nanny tells them they have to stay in the nursery, where they imagine that they are on a deserted island.
Kermit stumbles upon Nanny preparing a surprise for them for the next morning and promises not to tell anyone; but the other babies spend the night trying to get Kermit to confess to what he saw.
As they wait for their favorite sweets, the blueberry muffins, to arrive from the store, the kids imagine they're on an adventure in a supermarket. They also imagine how farms produce muffins and other food.
The kids get to babysit Kermit's nephew, Robin, who's still just a tadpole. Piggy suggests that they entertain him with their own production of the Little Red Riding Hood - starring her.
The babies get invited to a costume party and Nanny gives them a box of old costumes for them to pick from; Gonzo goes through several and has trouble deciding which one to be.
The babies declare it Nanny's Day and give her the day off while they take over the cooking and cleaning, and the most important job of finishing her big surprise.
