Personalized I'm One Elephant Toddler Long Sleeve T-Shirt. I'm One! A cute circus elephant balances on a big ball while colorful confetti and streamers burst behind it. Adorable 1st birthday gift for your little one year old. 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.