I made this as part of Dollar Store Project Accessory Challenge at Dollar Store Crafts.
It is meant to not only be a fashion accessory, but to take off and use as a roadway for toy cars (posted just prior to this post toy cars with removable cars from pin backs) to keep a young boy occupied when going to the Doctor's office, relative's house, etc to keep them entertained then easily.
I turned the t-shirt inside out and drew the shape on the t-shirt - the length is 20 inches from the shoulder to the bottom of the track and the track is 2 1/2 inches wide.
(Not pictured) - I continued around on the shape around the neck and only cut through one layer of fabric.
Pin the track on the back side of the fabric and cut out.
With right sides out on the fabric on each side, pin the track together and sew around outside edge then the inside edge 1/4 inch from the edge.
Paint yellow stripes down the center approximately 1/2 inch long. On one side I chose to put a solid line next to this for a "no passing zone" but that is optional.