In what year did the children's park where "Blue Flyer" is located open?
Blue Flyer: Blue Flyer (formerly Zipper Dipper and Warburtons Milk Roll-A-Coaster) is a Wooden roller coaster at Nickelodeon Land, Blackpool Pleasure Beach in Blackpool, England. Nickelodeon Land:  It opened on 4 May 2011 and is in the place of Beaver Creek which closed on 5 September 2010 after Amanda Thompson announced that the Pleasure Beach would be working with Nickelodeon to open a new and modern children's theme park.
2011