Need suggestions for a day out somewhere between Sheffield and London. Family get-together with 6 children aged 5, 4, 3, 3, 2.5 and 3 months. Places which have already been suggested are Drayton Manor, Conkers, Gullivers Kingdom (Milton Keynes), Twycross Zoo, Woburn Safari and Whipsnade Zoo. I've been to Whipsnade several times, but haven't been to any of the others.
Would appreciate any comments on these places and I'm sure there are lots of places we don't know about - would particularly be interested in any farm type places and places which have good indoor activities as well as outdoor as knowing our luck it will be raining. We are going the 1st weekend in September.