Tuesday 9 August 2016 4.28pm
There's Pineapple in Cov Gdn on Sundays, and they take kids of 4. Short tube or bus ride for you.
The Siobhan Davies place at the back of the National Theatre
also does children's classes, but *I think* they are more classically-biased and *I think* they are in the weekdays (but do check, as I'm quite possibly wrong/out of date with that "info").
...if you press it, they will come.