Time to kill near Paddington

[DoYouRememberTheInnMiranda]

Does anyone have any suggestions for how to entertain my 6 and 4 year old girls while we're waiting for a train from Paddington on a Saturday early afternoon?
We could possibly meet a friend for lunch if we can find somewhere to take them, or a museum or something would be even better. I've probably got 2 hours there.
Thanks for any ideas.

Some of this may be useful: www.heatheronhertravels.com/things-to-do-around-paddington-station/

The Paddington Basin area is quite nice if the weather's ok but it's mainly offices.

You could go up to Little Venice? Or you're maybe 15 mins on the tube from Westfield?

We go to Kupp on Paddington Basin. We do lots of walks around that area - loads of boats and stuff to look at.