Pop singer Nena sings "La Le Lu," a well-known German lullaby.

This song about monkeys is well-liked by German children and appears in many books of children's songs.

Naya tries to play princess, but Jo has been playing in the mud all day and is not exactly fit to play the role of a prince. At least he has a nice song to sing about it!

While Naya is enjoying her riches as a princess, Jo simply refuses to clean up, and lays down to sleep. How can Naya get him to be a more suitable prince?

With Jo asleep, Naya engages her plan to make him clean the castle. Caruso helps her by singing along!

Naya has to be creative in finding ways to make Jo become her ideal prince!

Will Jo be able to complete the final challenge? Will he figure out that Naya is playing a trick on him? Here is the conclusion of this episode of JoNaLu.

It's hot outside and Jo, Naya, and little Lu really want ice cream. They've found the refrigerator, but where is the ice cream?

Jo, Naya, and Lu are looking for the sea but find themselves stranded! Luckily, water seems to be nearby...

Naya, Jo, and Lu learn the hard way that sometimes games can go a bit too far.

Jo has opened up a store, but needs a bit of help deciding where things go.

Shooting stars may be good luck, but so is having good friends.

Naya gives Lu and Jo cookies to help them get well, but it seems they might be faking.

The search for buried treasure begins!

Jo is so obsessed with his train that he forgets a promise he made to Naya.