This was our first trip to Blue Kangaroo, which is just down the road from the also excellent Chutney Mary Indian restaurant on King's Road.
Upstairs it's a modern restaurant with a concise modern menu (catering for adults and kids equally well), and downstairs it's a kids soft play centre (with snack bar)!
Food was good, service relaxed and friendly, and as long as you can handle a slightly manic environment with hoards of kids - including group parties going on - you'll have a great time. Goes without saying that they have all the kit you need to entertain and assist whilst the kids are eating (high chairs, balloons, crayons, etc).
You pay extra for the kids to use the soft play centre, but its well worth it. If your kids are old enough - and you fancy a slightly quieter meal! - then they can go and entertain themselves in the play centre, and you can keep an eye on them via the big screens in the restaurant. The play centre is a big, well designed, space with different areas for kids of different ages. Spectators can get a drink and snack as the little ones go bananas, and it really is a fun environment.
And as an extra bonus they provide free wi-fi - useful if you can keep your focus, but not sure it makes for the best working environment!
So it's a great place to go with the kids to have a good meal and for them to burn it all off afterwards in the soft play centre! Thoroughly recommend it.
Their website is http://www.thebluekangaroo.co.uk.