Hever Castle is a great day out. A tudor castle, where Anne Boleyn was born, they have a yew maze and also a water maze - great way to cool down and have fun on a hot day. Check out their website,[ http://www.hevercastle.co.uk
], as they also have jousting days and falconry at weekends throughout the summer. This is great entertainment too! Take a folding chair, a picnic, a jug of Pimms
perhaps and cheer for your favourite knight!
Also, the Hop Farm is good for younger children. There is a small paddling pool; little cars to drive; animals in pets corner; train rides and lots of other attractions. This is a working hop farm , set in the countryside and also has far/historic exhibits based in the typical Kent oast houses, so a very pretty setting. They also have a website: http://www.thehopfarm.co.uk
Hope this helps!