Katerina's Costume: Daniel and Katerina are at Miss Elaina's Museum-Go-Round to make their costumes for Dress Up Day. While Daniel and Miss Elaina know exactly what they want to be, Katerina is having a harder time deciding on just the right costume. Eventually she comes up with a very clever idea! Dress Up Day: It's Dress Up Day in the Neighborhood of Make-Believe and it's time for the annual main street parade! The children visit all the stores, showing off their fancy costumes and receiving different stickers from their neighbors.