Kid's Zone is a fantastic play area for children under ten years old, within the National Army Museum. This place is cool! Its all about discovery and the kids can go wild in a safe environment. Just ask at the information desk for a timed ticket and you'll get over an hour of free play time. Kids can dress up in soldier's uniforms, scale the rock climbing wall, crawl through tunnels, and whiz down slides. There's loads to do. Adults can get a coffee from the cafe next door and bring it in and have a sit down while the kids tire themselves out.
2011 Update: There's now a small charge for over 1 year olds but this place is still fab.
3. London Zoo
What small child doesn't love animals? Children under 3 go free at London Zoo so take them when they're really young for the best value. If your family is older you'll need to check out the ways to save money on London Zoo tickets.
Tag Your Tot: You can 'tag your tot' with a wristband at the entrance. This is well worth doing as children can get a bit over zealous around the animals and it's hard to always hold on to them.
Live Events: You can see birds and monkeys out of their cages at the daily live events. Check the Day Planner when you arrive for the schedule.
You can book Skip the Line London Zoo tickets through Viator.
Coram's Fields is close to the British Museum and other attractions such as the Foundling Museum which is always free for children.
5. Kew Gardens
There's some useful information on the Kew Gardens website to help you plan your visit but all you really need to know about is Climbers and Creepers - Kew's interactive play area for under 9 year olds. Just remember to explore the Gardens first as once the kids get in there they won't want to leave! See more advice on visiting Kew Gardens with children.
You can buy Kew Gardens tickets through Viator.
6. London Eye
The London Eye is 135 meters high which makes it the world's tallest observation wheel. Small buggies are allowed on board but if you have a larger buggy ask at the Information Desk and they can store it for you. Each capsule is enclosed for the ride so it's safe for children to walk around. The capsule walls are glass down to the floor so children can sit of the floor and still get great views.
The London Eye has lots of extra fun on throughout the year, especially in the summer, and the staff are excellent with children.
You can buy Skip the Line London Eye tickets through Viator.
8. Tate Modern
The main shop, also on Level 1, sells excellent children's books, and the Cafe on Level 2 is fantastically child-friendly. As well as the kid's menu there's a buggy park, plenty of highchairs, plus crayons and coloring sheets.
The Museum of Childhood is a great free museum in east London. There's a free buggy park in the lobby and there's always staff at the entrance/exit so the children can't escape.
Expect to find dressing up clothes and other toys available. Beautiful rocking horses have a queue of excited children waiting in line for their turn. The indoor sandpit and funny mirrors are always fun, as is the designated soft play area for the under 3s.
The cafe is superb and has lovely tea. There are lots of highchairs and booster seats and the tables are large so you can sit with lots of friends. There are hot and cold meals as well as cakes and snacks.
10. London Aquarium
You can book Skip The Line London Aquarium tickets through Viator.