Broadway and Disney star Idina Menzel meets the Greenies and introduces them to musical theater.

Glee star and children's author Chris Colfer helps the Greenies find their voices in writing for their new original musical.

Every musical needs some great lyrics, but some of the Greenies aren't confident that they can write music. World famous singer Josh Groban visits to share his musical expertise.

The Greenies find out if they will get the roles they want for Mash-Up: The Musical. Comedian and actor Alec Baldwin visits to share his acting experiences.

Part of every good musical includes good dance, but some of the Greenies aren't sure ballet is for them. Tiler Peck and Robert Fairchild visit to share their ballet experiences.

Grammy nominated singer Sarah Bareilles shares her musical experience with the Greenies as they write the finale for their musical.

As the Greenies struggle to rehearse as a team, Ellie Kemper joins the Greenroom to share about the art of improv.

World renowned violinist and conductor Joshua Bell joins the Greenroom to share about music and the orchestra.

The Greenies learn how to bring the WOW factor to their show by learning about the circus. Performer and clown Bill Irwin shares his experiences.

When the instruments for Gus' percussion master class don't arrive, he calls on Stomp to teach the Greenies the basics of percussion.

Actor and Broadway singer Tituss Burgess joins the Greenroom to share costume ideas with the Greenies as they prepare for Mash-Up: The Musical.

As the Greenies struggle to put the pieces together for their play in their dress rehearsal, actor and director David Hyde Pierce helps to coordinate the actors as they prepare for the opening of their show.

The Greenies put on their show Mash-Up: The Musical, and Miss Julie tries to make sure Mrs. Brightful is impressed by the theater.