Personalized Structural Engineering Hero Toddler Long Sleeve T-Shirt. Structural engineering hero in arched text is a funny gift design for engineers and engineering students. 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.