Be budget smart
There are so many free activities in London (walking through Hyde Park, the Natural History Museum, the Science Museum, the Changing of the Guard and so much more). Mix those up with whatever your kids are absolutely desperate to do, and your wallet won't feel so attacked.
Some favourites that do have entry fees are Madame Tussauds, The London Dungeons, Kidzania and SEA Life London and it's definitely worth looking into a Merlin Pass if you're doing a few that come under that particular umbrella.
UK supermarkets are amazing, so stock up on sandwiches, snacks and fruit and eat picnic-style in any of London's charming green spaces between attractions instead of shelling out every day on cafes, restaurants and pubs. Transport can be costly so always check it's not actually an easy walk before jumping on the Tube - you'll see so much more too. Google Maps and a local SIM Card will be your best friends for getting around.
HIGHLIGHTS OF OUR TRIP
Our boys enjoyed everything they did in London but some of their personal top picks were:
The Emirates Aviation experience and Cable Car - Any plane-spotter will be in heaven and all kids love the cable car part, with great views over the Thames; you can do these separately.
Legoland - Though the rides probably suit younger kids, our boys loved seeing all the cities of the world built out of Lego and our youngest's eyes nearly fell out of his head at the Star Wars Lego exhibition, complete with moving Millenium falcon.
The Making of Harry Potter - Any Harry Potter fans absolutely have to visit the Warner Brothers Studio tour. Even as someone who has only read one of the books - many years ago - it was an utterly magical experience.
The London Eye - An iconic experience that gets you up and over London in such a gentle, unique way. Definitely book online for this one, as it can get really busy.
M&Ms store - Even I had to admit, this place had more candy than I have ever seen in one place. And with all those colours, it was kind of mesmerising. One of the biggest pick-n-mix situations you'll ever see.
They also had a great time on the Thames River Cruise, Transport Museum, Hamleys, lunching in Chinatown, the Natural History Museum, Borough Market and our little cricketer enjoyed his time at Lords immensely. You'd be hard-pressed to find a kid who couldn't find something in this enormous, varied, vibrant city.