Personalized My First Valentines Day Toddler Long Sleeve T-Shirt. It's baby's 1st Valentine's Day! This adorable kitten is surrounded with hearts and lots of love. Happy first Valentine's Day, little one! 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.