What is the world of little league museum? World of Little League® Museum. The mission of the World of Little League®: Peter J. McGovern Museum and Official Store is to inform and educate people about the history, service, goals and initiatives of Little League Baseball and Softball. The World of Little League is located at 525 Montgomery Pike (U.S. 15) South Williamsport, Pennsylvania.How do i contact little league international? For all Little League International inquiries, please contact: Little League International. Little League Baseball and Softball 539 US Route 15 Hwy, P.O. Box 3485, Williamsport, PA 17701-0485 Phone: (570) 326-1921 / Fax: (570) 326-1074 Little League Support. Contact Little League InternationalHow do i contact little league williamsport pa? Little League Baseball and Softball 539 US Route 15 Hwy, P.O. Box 3485, Williamsport, PA 17701-0485 Phone: (570) 326-1921 / Fax: (570) 326-1074 Little League Support. Contact Little League InternationalWhere can i get little league apparel and collectibles? Get your Little League® apparel and collectibles at the Official Store located inside the World of Little League® Museum. Get everything from souvenir baseballs to collectible pins. Open Daily from 9 a.m. to 5 p.m.