Personalized Music Treble Clef Design Toddler Long Sleeve T-Shirt. Music Teacher Gift Toddler Long Sleeve Tee - Black has pretty green treble clef symbol. 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.