Personalized Coolest Trombone Teacher Toddler Long Sleeve T-Shirt. The world's coolest trombone teacher in snow capped text with a snowman playing a trombone is a funny design for teachers at birthdays and holidays. 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.