Personalized Grandma's Sweetheart Toddler Long Sleeve T-Shirt. Toddler Long Sleeve Tee - White with lots of hearts and pretty pink text that says GRANDMA'S LITTLE SWEETHEART. Perfect for Valentine's Day. 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.