Personalized Happiness Toddler Long Sleeve T-Shirt. Happiness is a cup of cats. Pink polka dot cup overflowing with cute hand drawn cats and kittens. If coffee, tea, or kitties all give you a warm and fuzzy feeling, then this is for you! 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.