Got this book for my Eldest daughter Annie and she absulotley adores it.
For younger children (shes 4.5) the amazing drawings and pop ups (you can sail a ship through Tower Bridge) are fantastic, for older children theres a wealth of information on every page, detailing the history and culture of the City through its famous landmarks, it's so detailed it's almost a 3D Map.
For very little ones it should be noted some of the pop ups are very delicate, so little fingers may not suit it,
for older childen though this book is highly recommended