Personalized 4th Birthday Penguin Toddler Long Sleeve T-Shirt. A penguin in colorful shorts has a triple scoop ice cream cone to celebrate the four year old's 4th birthday! 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.