Oona's Little Actor Store is the shop from the episode: Who's Gonna Play The Big Bad Wolf?
Goby wants to put on a little play, so he goes to the Little Actor Store, owned and is ran by Oona. He finds trouble though trying to pick the right actor for the roles of the angry monster and scardey cat. With the audiances help, Goby makes the right choice and they successfully put on his play.
It was a small purple shop with paintings of famous actor shrimp on the wall. On the counter is a small stage where the actor shrimp audition.