Personalized I'm Three Toddler Long Sleeve T-Shirt. I'm Three! A foam finger and hand number three with "three" spelled out with a 3 in the E. Is there any doubt who three! Cute gift for any little sports fan. 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.