Thanks for all the help, now here come all of the questions:
-- when doing a name, can I use something other than the actual letters in the name? Ie, my youngest calls my eldest "Gargar"; can I use "G-R-G-R" as his name? (it's a pretty good sign combo..)
-- does it matter which hand I use to do things?
Any other tips?
Fio and geekgrrl, you guys are my fave people at the moment. Have received the Dave video (brilliant!) and all of the Makaton stuff. The official rep here in CH told me she couldn't sell it to me without a training course... which she could provide in July and presumably for shitloads of money.
My son loves it. Thanks to all for your help. Will report back with more thank-yous after the dev paed visit.
Jimjams, my sister gave me the same kick in the ass about that! You guys would get on well.