Personalized 3rd Birthday Construction Party Boy Outfit Toddler Long Sleeve T-Shirt. Cute construction work truck with I'm one quote for a little boy turning 3 years 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.