Personalized Hippo 2nd Birthday Toddler Long Sleeve T-Shirt. Hippo 2nd Birthday! I mean Happy 2nd Birthday! A cute, smiling hippo wearing a birthday hat sits in front of a birthday cake ready to blow out the candles. Cute second birthday gift for the two 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.