Personalized Sweetheart 16 Toddler Long Sleeve T-Shirt. Cute pink sweet 16th birthday Toddler Long Sleeve Tee - White with curvy pink text and says SWEET 16 surrounded by pretty pink hearts. 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.