Personalized Cute Turtle 4th Birthday Toddler Long Sleeve T-Shirt. 4th birthday I'm 4 Toddler Long Sleeve Tee - White with happy smiling turtle with bow tie and party hat holding balloons and big red polka dot number four on his 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.