I'm guessing by imaginative play they mean pretending? I wonder if that includes pretend crying, River has crocodile tears all the time. :P Until he realises I'm not looking (well, I am, but not letting him know that!).

Just remembered we've got our 18month check up tomorrow too (sneaking it in with Si's 2week one, otherwise she knows I wouldn't turn up ) so we can compare notes after that!