Personalized I Have Down Syndrome Youth T-Shirt. Pretty yellow and blue awareness ribbon with I Have Down Syndrome quote is a simple way to let others know to be supportive in their interaction and comes on a Youth T-Shirt - Kelly Green. 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.