Personalized Professional Eggineers Youth Long Sleeve T-Shirt. Eggineers are engineering eggheads. Society of Professional Eggineers text with a 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)