shoppingsecret, thanks for saying hello - of course I didn't mind! I may have appeared a little distracted because a) we had a train to catch and b) no fewer than three sultry Year 6 sirens had greeted DS1 on the way down that road and I was wondering whether perhaps he could have appeared a little more polite and less dismissive, but then again maybe he has sense . I'm glad your trip to the Natural History Museum went well.
Dulwich Park now has a lake again. It has a good playground and is good for cycling. You can either take your own bikes or hire them there. The bike hire place has banana bikes and three wheelers as well as conventional ones.
Further east, Kelsey Park has Punch and Judy sessions on Wednesday afternoons in the holidays, big lakes with ducks, geese, swans and herons and lovely (but quite sloping) places to cycle if you ignore all the no cycling notices like everyone else does .
I forgot to mention the Woodcraft Folk Playout sessions - free, non-competitive games sessions often featuring parachutes, frisbees and fruit punch making. Look on a park notice board near you for details - I know they do several venues in Lambeth and there may be others around London (and outside). I looked for a website with details, but couldn't find one. There's one in Hillside Gardens on Thursday 27 July - I can't remember the time.