Personalized Music And Math Toddler Long Sleeve T-Shirt. Music builds the mind for math with the word music in musical text is a unique design promoting the need for music education. 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.