Recommendations for lunch in London for six year old

[tillytubby]

I'm taking ds1 (6) to London next week to see a matinee performance and wanted some ideas for child friendly places for lunch. Something with a bit of novelty or wow factor.
We will be in the picadilly area.
I've looked at the rainforest cafe but the reviews look dreadful!
Thanks

Rainforest cafe is massively overpriced but it is basically the definition of "wow factor for six-year-olds"

Rainforest cafe, Dd loved it at 6, for kids it's amazing, the food was fine and DD has talked aboutit lots since.

Inamo is a fun restaurant serving all sorts of Asian/oriental dishes. The food and the service is good, but the best bit is the interactive tables! Each table-top is interactive, on which you can order your food, graffiti, play retro games like battleships with the rest of the people on your table and customise the mood/lighting. You can even watch your food being prepared on a 'chef-cam'. There's a children's menu with some simple dishes like BBQ vegetable noodles, spring roll and Korean chicken wings.
Bubba Gump is our second favourite. It’s got a cool Forrest Gump theme and children can build their own ice cream sundae.
Pizza Pilgrims has a few restaurants across London, including a lovely spot just off Carnaby Street. Their stone-baked pizza is amazing, but leave room for the Nutella pizza ring for pudding.
Planet Hollywood is also quite fun. There's plenty to keep kids entertained alongside their burgers and fries, including colouring sets and movie memorabilia.