Personalized 5th Birthday Penguin Toddler Long Sleeve T-Shirt. 5th Birthday Toddler Long Sleeve Tee - Light Blue party celebration gift has cute penguin in a polka dot hat with the number 5 on its tummy. 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.