Walmart: Dora’s 10th Birthday Party on August 14th! August 12, 2010 This post may contain a link to an affiliate. See my disclosure policy for more information. Celebrate Dora’s 10th Birthday at Walmart on August 14th for a fun celebration with FREE cupcakes for everyone! Kids will also receive a FREE photo print with Dora in her special birthday dress. Thanks, Mojo Savings!