I'm glad this is going in Barton Square, I could imagine it a bit cramped at the top of the Orient, plus I quite liked the crazy golf, climbing wall and the laser quest!
EDIT - And is that a MetroLink extension I see? That would be amazing, and very beneficial if the discovery centre wants to stand on it's own, having it's own visitors rather then just catching those who are at the trafford centre!
Plus Barton Square is lovely, here's a picture of it
The Lego centre will be positioned on the 1st floor, just right of this picture!