Yo-lala i-Ping, yo-lala i-Pong!

Matilda can not fall asleep. Ping offers her several solutions but without any success. Ping and Pong decide to compose a lullaby with the participation of the sheep.

When Ping feels melancholy on a rainy day, the rhythm of the raindrops pushes him to walk happily under an umbrella while dancing taps.

Pong is looking for an original sound to finish his composition but will soon discover the delicious sound of bees with the help of his friends.

When Ping and Pong ask Mr. Picou to become their conductor, he gets nervous. Together, they will have to help him overcome his fear.

Mr. Picou's bell does not work anymore. He is worried because he is waiting for a package and is afraid to miss the postman especially when the bell joins Pong's orchestra.

Pong beats his drums to the rhythm of crackling popcorn, but he can not keep up when Ping pulls a bag into the machine.

When a strange dissonant sound disrupts life in the Valley of Songs, Ping and his friends challenge each other to find what's wrong.

Ping and Pong have fun jumping in the puddles, but they dirty Mr. Picou's laundry drying on the rope. On a rhythm of a bluegrass song, they help Mr. Picou to rearrange everything to welcome a special guest.

Ping and Pong are constantly trying different ways and tools to help a little lost baby seal to feel the rhythm.

An African friend visits Ping and his friends in the Valley of Songs. But when he makes them discover his music, Ping becomes frustrated because she has trouble keeping up.

Ping, Pong and Trix06 are busy creating music to comfort Mr. Picou whose disc broke and the tomatoes were crushed.

Pong is stuck out of his house and can not access the instruments he needed to play at the sheep's birthday party. New instruments must be found quickly!

Pong receives a postcard from his grandfather announcing that he has hidden a surprise in the toy box. Ping and Pong discover a treasure map and they start the adventure by following the clues.

When their soccer ball deflates, Ping and Pong turn it into a Brazilian musical instrument: a cuíca. The football game becomes a samba!

When Ping, Pong and the sheep organize a dance party, Mr. Picou wonders how he can join the party.