The number 5 is titled "Si Buaya dan Si Burung yang Menyanyi", a story about a crocodile (buaya) and a bird (burung) who's friends, and burung always sings on buaya's head. One day buaya is yawning and accidentally burung fell into his mouth. For a while buaya thinks he finally can sing like his friend until he realized it was just burung who's in his mouth. Buaya is sad because he can't sing, but burung told buaya that can sing too by using bUbbles that unexpectedly harmonizes with burung's singing.