Personalized Daddy's Little Helper Tool Set Toddler Long Sleeve T-Shirt. Tool set design says Daddy's Little Helper in this fun Toddler Long Sleeve Tee - Black for a boy. 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.