Personalized Future Bookworm in Training Reading Gift American Made T-Shirts. Bookworm in training American Made T-Shirt - White with stack of books and little worm for boys or girls who love to read Enjoy the comfort and durability of this 100% cotton t-shirt Born in the U.S.A. 5.4 oz., pre-shrunk 100% cotton. Heather Grey is a cotton/poly blend. Double-needle stitching throughout. . Seamless collar. Shoulder-to-Shoulder taping. Made in America.