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Peg and Chat must find a way to communicate with the inhabitants of the Pea Planet who cannot hear. Will they find a technique to make themselves understood and especially to solve a problem?

Peg and Chat find themselves in New Orleans for the Mardi Gras celebration where they must follow instructions to repair the float and read sheet music to put the musical notes back in place. In this adventure, they will also learn about ordinal numbers.

Pegcasso and Vincent Van Chat have become world famous painters, they paint with shapes, it's cubism. There is nothing they can't paint.

Peg becomes an expert in size to help her friend Richard make a plasticine video. Peg explains objectivity so that everything is the right size.

Rochon-Grognon Bear only gives zeros: he gives bad marks to everyone. Peg offers him some fruit to change his mood. Cat and Peg decide to count backwards to calm down.

Peg and Cat learn the value of time while Peg waits for a package to arrive in seven minutes and Cat has to pass the time for many seconds, it's a real torture. The minutes are very long but they can be so short when trying to avoid an egg explosion.

Peg and Cat, aboard their train, must solve a riddle as objects disappear. They also explore mathematical vocabulary related to spatial reasoning.

The competition is fierce at the scout camp between beavers and raccoons: the two teams compete in a series of tests to determine who will be the winner.

Peg and cat play with doubles and halves as they want to give 15 beavers to Jessy, but he has two mailing addresses.

Peg and Cat explore numbers and the concept of quantity as Peg goes on a search for Cat in the forest and must help him get down from a huge tree.

Peg and Cat must help Romeo reach Juliette by finding solutions to all the problems they encounter.

Peg and Chat help the President solve her problems as they visit the White House.

Peg and Cat explore the triangles as they must save the pig who adores the opera floating in space.

A strange shape appears in the sky. New problem-solving directors, Peg and Chat are summoned to the White House to design the Pig Catcher model.