Alphablocks 2 сезон 8 серия — Эпизод 8

U gets the balloon ride of his life, but he is still unhappy - or so he thinks! When unhappy U meets perky P, things can only go one way - up. Now U's only problem is getting back down.

This episode introduces the letter U and the words up, cup, pup, pop, sum, mug and mud.