Personalized Royal Trombone Teacher Toddler Long Sleeve T-Shirt. Trombone teacher text wearing a crown and a trombone drawing is a humorous design for your trombone teacher at back to school and graduation. 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.