Personalized 4th Birthday Turtle Toddler Long Sleeve T-Shirt. A cute little turtle jumps for joy for its giant birthday cupcake with sprinkles and a 4 candle on it. Adorable 4th birthday gift. 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.