Thanks Efjay. We use Macleans as well because DP reacts badly to Colgate (makes him spew) but I never thought of getting DS a children's toothpaste Will give it a go. It's good to hear that they get there eventually.

This is a bit OT but we will be on tank water in the next year or so too. I was listening to an ABC podcast about kids teeth tonight and they were saying that in non-fluoride areas the best thing to do is get the fluoride tablets and crush them into drinking water to ingest it gradually rather than a full hit with a tablet but that they're hard to get because they're out of favour and not being made anymore. I might investigate, perhaps they are available locally because of the lack of fluoride.