On my ninth birthday I had a sleepover at the Science Museum, and I was allowed to invite a few friends; it was awesome and seemed pretty out there at the time, but I didn’t really consider it theatre. But apparently the two can mix (and now it seems sleeping overnight in public buildings isn’t so unusual). Running until the end of July, you can check-in for a night’s kip at The Barbican for Lullaby; an immersive theatrical experience created in collaboration with Duckie. And boiled eggs and soldiers are served in the morning!