Personalized Mechanic Nuts and Bolts Toddler Long Sleeve T-Shirt. Mechanic Nuts and Bolts Toddler Long Sleeve Tee - Black, with "mechanic" underlined with a wrench and bedecked in nuts and bolts, are a unique gift design for professional and weekend mechanics! 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.