Last weekend we (my husband, myself and our kids) had a treat and were taken to see 'Emil and the Detectives' at the National Theatre by my parents in law.
The play was very good -- fairly low on plot complexity (which is what you'd expect from a children's story, I suppose), but extremely well directed. Lots of clever scenery, the inevitable chase through the audience, and a huge cast of children with excellent acting ability displayed by those in speaking parts.
After the play we were spoilt even further and taken to the Mezzanine Restaurant at the National. We had a lovely meal--the food there is always first class, especially the freshly baked bread--and the kids benefited from the new children's menu. They chose chicken and chips followed by ice cream, which suited them perfectly.
So, we all had rather a grand day out at the National!