DD1 went up there when she was 5. I know families who have put younger kids in bunks though. The only issue I think is can she climb down in the dark? And, Is she night TT? If not, is that going to be an issue with bed wetting and stripping the bed etc? DD1 has vomited in her bunk once and it was a nightmare to clean up!!

Divvy's kids have a bunk that's a low-line one and I know she has found that easier for clean up as it's not up so high (and again easier for the kids to get in to). I got mine from the same place as she did - Bunkers (you can look at the range online) and they are really great in terms of quality and range.