Personalized Smart Mechanical Engineer (white) Toddler T-Shirt. Toddler T-Shirt - Indigo with "Mechanical engineering, the profession for intelligent people" in rough white 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 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.