Personalized Trombone Halloween Pumpkin Toddler Long Sleeve T-Shirt. A pumpkin sporting a grin that spells trombone is a humorous Halloween gift design for trombonists, school music teachers and students in concert, jazz and marching band. A classic for Fall, Winter and Spring, these long sleeve toddler t-shirts are sure to be a staple in your child's wardrobe. Whether layered or alone, this t-shirt is soft yet durable enough to stand up to your toddler's playtime demands.