On the Sears website they're listed as Christmas trees and decorations, but they do have an ad campaigned called "Wish Big," which features a blue ornament and the words "Wish Big." It was probably just part of their ad campaign.
http://www.sears.com/sr/javasr/product.do?vertical=LAWN&pid=07195267000&adCell=P2&BV_UseBVCookie=Yes
They actually have several Nativity sets in their CHRISTMAS SHOP at Sears online.