Personalized Environmental Eggineer Toddler T-Shirt. Eggineers are engineering eggheads and this humorous egghead, muddy and wearing a respirator with environmental eggineer text, is a unique gift design for birthdays, holidays or graduation. A toddler-soft cotton tee in look-at-me, big kid colors. 4.5 oz., 100% combed ringspun cotton. White is sewn with 100% cotton thread. Topstitched rib crew neck. Double-needle stitched sleeves and bottom hem. Shoulder-to-shoulder taping.