Personalized Work With Nuts Toddler Long Sleeve T-Shirt. Structural engineers work with nuts text with and bolts,in smaller text below is a humorous gift design for structural engineers and college students at back to school, birthdays, holidays and graduation. 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.