don't forget the art galleries and museums..... those places have things for kids..... this big kid has had a go at them!
The Tower of London, they have a tour and a show which is great for everyone.
I've always wanted to visit Whitechapel...
Old Hampton Court palace. There are ghosts there..the little girl ghost is shy and she's only ever made contact with a few people, and she is by the stairs downstairs in the kings chamber. Also, there is fun reenacting there so your little girls can play horse, and the teenagers learn to dance as they did back in the day, and perhaps you may see the lady in blue (whom I saw on the third floor from the courtyard, when it was off limits to all but construction workers, and what's more, is that I had my glasses off and I could see her clearly.). There are lots of activities there, and it is rich with history. Perhaps your kids might see the adorable dog ghost. There was a fire once long ago in this palace (I know this cause the little girl told me about it).
Chessington and Thorpe park are not in London. As most people have suggested, stick with the museums, galleries etc.
Visit the memorial to WWI vets at St. Paul's Cathedral! Never forget the men who served.
Tower of London is always a good one for all ages and then the London eye is great too
Imperial War Museum, Science Museum, Natural History Museum. Those would be my first stops but there is loads more to see and do.
Tower of London, Baker Street to see where Sherlock Holmes lived. (I know he's a fictional character but they do have a plaque there for him.) Hyde Park, and of course Buckingham Palace. Have a great time. :)
Science museum! Great fun for all and lovely hands on fun for kids
Oh and the sea life centre.
Walk along the Thames too, and over the bridges. Go along to St Paul's cathedral.
Try and plan routes because things are closer than you realise and so some things might be walking distance which means you all see even more and avoid the tube.
all of them
Tate Modern! And walk South Bank, there are always dressed up people-statues and things going on. Tate Modern is my favourite, the art is quite entertaining and funny :)<br />
From there, you are basically in the centre... and next to London Eye!