Personalized Smart Mechanical Engineer Toddler Long Sleeve T-Shirt. Toddler Long Sleeve Tee - Pink with "Mechanical engineering, the profession for intelligent people" in rough text with the M in mechanical wearing a hard hat make a funny design with attitude for college students and engineers 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.