Personalized Red Heart Valentine Toddler Long Sleeve T-Shirt. I Heart Toddler Long Sleeve Tee - White with the cute red heart design. An I love you gift, Valentine's Day sweetheart gift or heart gift for a friend. 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.