Personalized I'm 21 Toddler Long Sleeve T-Shirt. Happy birthday! You're legal! Visit your favorite bar & say: I'm 21. My ID finally has my own picture! 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.