Personalized 2nd Birthday Mermaid Party Toddler Long Sleeve T-Shirt. Do you know a little girl who's turning 2 and loves mermaids?Toddler Long Sleeve Tee - Light BlueIf so, this I'm Two! 2 mermaid tail design is perfect for her to rock at her birthday party! 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.