Mille and Martin, two best friends who are fond of animals, are big enough to walk a dog like several of their neighbors do. But there is one problem: A big black dog that scares dogs and children.
Mille and Martin's neighbor has a goldfish swimming around in a glass bowl. They wonder if the goldfish could go on a trip like other animals, or even greet friends from its own environment?
Mille and Martin have several neighbors who own caged birds. The birds look a little lonely as they sit in their respective cages, so Mille and Martin want to help the birds have fun together as humans do.
Mille has a pet turtle, but Martin only has a toy hare. That's okay. They can make a race between the hare and the turtle, just like in the fairy tale.
Mille and Martin would love to ride some of the horses close to them, if it wasn't for the fact they're too small. So they'll get to make their own horse and rider.