Personalized Professional Eggineers Youth Long Sleeve T-Shirt. Eggineers are engineering eggheads. Society of Professional Eggineers text with an egg carton of engineering eggheads will tickle the funny bone of your engineer at birthdays, holidays and graduation. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)