Personalized Penguin 2nd Birthday Toddler Long Sleeve T-Shirt. Penguin holds a birthday balloon with a 2 on it. Cute on a t-shirt! Happy 2nd b-day 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.