Personalized Hydraulic Engineer Water Drip Toddler Long Sleeve T-Shirt. Hydraulic Engineer Water Drip Toddler Long Sleeve Tee - White display Hydraulic Engineer in curved text dripping in water. Makes a unique gift design for civil 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.