Magic t-shirts turn colorful in the sun and they return to black and white without sun. Ours depicts a steam locomotive coming from a tunnel and the words ALL ABOARD. Magic T-Shirts® is a Federal Trademark and guarantees a quality color change product. Magic T-Shirts® are printed on Gildan® Ultra Cotton 6.1 Oz. shirts. They are 100% cotton. Available is children's sizes 3T, XS, Small and Medium. Machine washable.