A. B. Graham started one of the youth programs in Clark County, Ohio, in 1902, which is also considered one of the births of the 4-H program in the United States. The first club was called "The Tomato Club" or the "Corn Growing Club". T.A. "Dad" Erickson of Douglas County, Minnesota, started local agricultural after-school clubs and fairs also in 1902. Jessie Field Shambaugh developed the clover pin with an H on each leaf in 1910, and, by 1912, they were called 4-H clubs. Early 4-H programs in Colorado began with youth instruction offered by college agricultural agents as early as 1910, as part of the outreach mission of the Colorado land grant institutions. The national 4-H organization was formed in 1914, when the United States Congress created the Cooperative Extension Service of the USDA by passage of the Smith-Lever Act of 1914, it included within the CES charter the work of various boys' and girls' clubs involved with agriculture, home economics and related subjects. The Smith-Lever Act formalized the 4-H programs and clubs that began in the midwestern region of the United States. Although different activities were emphasized for boys and girls, 4-H was one of the first youth organizations to give equal attention to both genders (cf., erstwhile Boys Clubs of America). The first appearance of the term "4-H Club" in a federal document was in "Organization and Results of Boys' and Girls' Club Work," by Oscar Herman Benson (1875–1951) and Gertrude L. Warren, in 1920. By 1924, these clubs became organized as 4-H clubs, and the clover emblem was adopted. Warren expanded the scope of girls' activities under the program (promoting garment making, room decorating, and hot lunches), and wrote extensive training materials.