Personalized Geek Dark Products Youth T-Shirt. A happy brain with the text Geek is a humorous design for the brilliant mind for 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.