We went for a day out at the Yorkshire Wildlife Park on Thursday and it was great. DD (4) loved it, her favourites were the tigers and the baby lemurs! Lots of spots where you can get close to the animals including a South American walk through area with capybara, monkeys, rheas etc and generally very happy well cared for looking animals. Also lots of good picnic areas and a cool playground.
Also vouchers to take kids free here www.yorkshireattractions.org/special-offers/