The Lowry

The Lowry exhibition is fixed and has interactive elements and there family packs (free but deposit required) to get the children to draw in the same way.
There are also old photos of the war etc and an extra exhibition that changes regularly together with workshops in both dance/drama and crafts.

This is a great day out and can be combined with the Imperial War Museum, just 5 minutes away which also has a quiz trail and free workshops during the holidays.