Middleton, WI, 2016-Sep-01 — /EPR Retail News/ — American Girl®, a premium brand for girls and subsidiary of Mattel, Inc. (NASDAQ:MAT), today (August 31, 2016) announced a multi-year partnership with the world’s leading dedicated toy and baby products retailer, Toys“R”Us, Inc. The collaboration will make Toys“R”Us® the first and only U.S.-based retailer to feature American Girl shop-in-shops…