Deema's Marching Mart is a Shop segment from the episode: Ducks in a Row!
In this shop segment, Gil goes to Deema's store and describes different instruments for Deema. He needs a percussion instrument, Deema asks the viewers and Gil finally gets what he needs. Oona also appears in the segment, asking for a wind instrument.
Gil goes to the Marching Mart. He wants to join the band and needs an instrument that'll keep him with a matching beat. Deema explains the brand of instrument he needs, then shows him some but he comments on how only one of them is the one he needs to band on. The drum! He takes the instrument, then leaves while playing it. Oona then comes in and asks for an instrument that you must blow into and she sees one wind instrument out of three choices. A trumpet, cymbals, or xylophone. Oona then blows into it and Deema calls Gil back. Oona and Gil then proceed to play together.
- When Deema said to Oona: "You'll need a wind instrument" Oona actually needed a Brass instrument, since the trumpet is part of the brass group