Personalized Engineering Smile Youth T-Shirt. A smiling face made from engineering text with the caption, Makes me smile is a humorous gift design for engineers and engineering students at back to school, graduation, birthdays and holidays. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.