Kids' Wonderful Wizard of Oz T-ShirtBaum counted Brothers Grimm, Alice in Wonderland and local landmarks among his influences for this 1900 children's classic. But the name of his book is alleged to come from his filing cabinet, at which he glanced and noticed the label "O Z." From the first edition cover. Product Details 100% cotton Distressed, softened print Color: lemonade Size & FitUnisex sizing Each purchase helps to fund literacy programs and book donations to communities in need.