Quite well, although I think leading the activity would be a bit of an over description of what happened. I turned up with all my stuff, and 4 other families showed up, with one more latecomer about a half hour later. The children disappeared to play outside and the mothers stood around and chatted while I wondered what precisely I was supposed to do. Eventually (about half an hour into the three hour session), enough ppl stopped chatting for me to suggest that we put some tables up and chairs round. I laid out all the stuff - cards cut to correct size, variety of bits of paper, sticking equipment, felt tips, crayons, wax crayons, pastels, and my printouts of existing cards. Basically the children got stuck in without waiting for any kind of explanation, one boy said “what’s the point of that then?” and legged it outside, promptly followed by all other mobile boys (no, tell a lie, one five year old made a card first) and one little girl stuck with it for over an hour and a half. I gave up on trying to explain anything about it and just sat making cards for myself - probably not best leadership behaviour, but I’m too new to the group to know how it usually works.
Both ds and dd thoroughly enjoyed themselves, and I got to chat some more - they are a fairly friendly bunch, although obviously a lot of them go way back.
Called in at Tesco’s on the way home - looking for pressies for the two blokes in my life as they both get older this week.
Got home, felt absolutely wiped out, so retired to bed and slept for four hours. Guess I might have the edge of this virus that dp has had. 
Feeling fine this evening though - want to have a quick go at an entry for End of Story - tonight is really my last chance to get it in the post tomorrow.