Update and a plea for some advice.
Daytime is good now - hardly ever any accidents (with the exception of poos still, but he has managed to get one in the potty this week, so I'm keeping my fingers crossed). We have run into a few problems though, so I'm hoping someone with experience of all this can give me a few tips!
We've tried to introduce a "special" toilet seat as GF suggests, but he's really not interested and once when we were out and I had to perch him on a "big" toilet he almost screamed the place down, so it looks like it's potties or nothing. Is this fairly normal? At what age did you introduce the big toilet to your kids? Is a portable potty a good investment or a bit of a waste of money (i.e. should I resign myself to carry around the normal potty instead?)
Nursery days (two afternoons a week) really throw everything out. He can be perfectly dry all morning, go to nursery and then refuse point blank to go on the potty there. He hasn't had any accidents there, and manages to hold it all in for hours (despite drinking tons of juice there), but the second we get in the front door once I've taken him home, we don't even get a chance to take his shoes and coat off, let alone manoever to a potty - everything just gets soaked! Am at a bit of a loss to help with this one? Should I just go for outright bribery - "I'll give you some chocolate when we get home if the nursery staff tell me you did a wee on the potty while you were there"? Any ideas why he might be doing this?
The final problem is a bit weird. Despite being in a (pull-up) nappy over night, he's still treating them as pants and wakes up to ask to go to the potty. If he does have an accident he demands a fresh nappy. Now, I'm fairly pleased about this as it shows he's got the idea, and that was the point we got pull-up nappies - didn't matter if he had an accident but gave him the option. The problem is it's about 3 times through the night and we're suffering! Whether we allow him to take a drink to bed with him or not (he normally has a little bottle of water) seems to make no difference in frequency or volume of wee, but if we do ban it we get a very crotchety thirsty boy in the morning. Help! I don't really want to tell him that he should just do his wees in his nappy, but at the same time we're not really expecting him to be dry at night anyway yet (wasn't planning on even thinking about it until he was 3).
Sorry, this is a really long post, but hoping for the benefit of mumsnet wisdom.