Zoe sets off at a running start for her ballet jump but she slips and breaks her arm. When Zoey returns from the doctor, she still wants to play but she can't find anything fun to do. Charlie, Rosita, and Elmo come up with the idea of changing the words to the song "If You're Happy and You Know It," so Zoe can be part of it too, even with a broken arm.

Charlie, Grover, Rudy, and Abby help Rosita and her abuela plan for a friend's fiesta. While trying to figure out what they need for the party, they try to guess who Rosita and her abuela's friend could be.