The Goodwill Games unveiled their inaugural children's initiative -- The Junior Goodwill Games -- which will oversee local and sectional competition information; sponsor support; and the involvement of over 120 cable operators nationwide. Olympic decathlon champion Dan O'Brien is the program's main spokesperson. The program is expected to reach one million children through track and field, swimming and basketball competitions. Supporting O'Brien as spokespeople are Olympic swimmer Jenny Thompson and Hawks G Steve Smith. All three athletes will appear in national print/TV ads, as well as present awards at the Junior Games finals. Universal Marketing Associates is administering the program, which starts May 15, and the Games will be promoted through SI for Kids. Three Goodwill Games sponsors will be involved in the Junior Games -- Johnson & Johnson is sponsoring swimming, Snapple is sponsoring track and field and Canon is sponsoring basketball (Goodwill Games). The competitions will involve 8-to-13-year-olds (NEWSDAY, 4/29).