We've been to the Imperial War Museum North a few times now, and my boys always enjoy looking at the exhibits and seeing the Big Picture Show, but the special events for school holidays really are so well done, they're always the highlight.
First we were all taken into the main space, and had story time underneath the Harrier Jump Jet. This was really different, really cool, and actually gave the children a chance to sit and look around them while the story telling was taking place. It wasn't too distracting, but it made us very aware we were in the museum, rather than being off in a white-walled room that could be anywhere.













