Personalized Santa Hat Cello Toddler Long Sleeve T-Shirt. A cello wearing a Santa hat is a funny musical instrument gift tee for string musicians, teachers and students at birthdays, Christmas and the winter 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.