Yeah, worth booking in advance for the paddling pool of it might be a nice day
Not as good as his other stuff imo (too much wood getting in the way) but still worth seeing. And some of the new decor stuff on the floor below is cool too.
If you book a meal deal at skylon in royal festival hall (2 courses for 20 quid) you can get into the exhibition for free (usually 11 quid) - so effectively a really nice brazilian meal for 9 pounds... think about it. Also if you're with hsbc take your card along and when you buy your ticket you get a voucher for a free cocktail.