Personalized Lovable Heart Toddler Long Sleeve T-Shirt. Toddler Long Sleeve Tee - Charcoal with a cute, smiling pink heart says LOVABLE. 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.