Hi Jennifer,
I've read different opinions on this topic for nearly the entire time I was pregnant. Some say switch ‘em when they are ready and others say switch ‘em when you're ready, others say after potty training is done, and yet others say wen you stop nursing (personnally, I think that's cruel, all your security blankets being jerked away all at the same time.. but hey, that's just me).
Anyway, my belief is that if the child is ready to move on to another mile stone in his/her life they will tell you in one way or another - and weather you're ready for it or not, really doesn't matter - or so I've found out.
In any case, I wanted to wait until my daughter was ready to move on to the “big girl” bed ( I didn’t have a convertible bed like you though)… The tell I was waiting for, was climbing out of her crib... Hmmm, that becomes difficult when your child doesn’t adhere to the natural order of things though… My daughter decided she didn’t want to climb out of her crib – ever. By the time she was 2 years old she was potty trained and I worried that if she had to “go” in the middle of the night she would be stuck in her crib and all her training would be ruined.
So, instead of waiting for the oh so elusive “bump in the night” - I took her to the furniture store and showed her all the “big girl” beds that she could have her pick of, when she was ready. It didn’t take her long to decide she was ready for a bed without bars… She got to choose her bed and viola, she’s a big girl now. We made a big deal out of the transition too, we had chips and dips for the movers and soda and she served them. It was a real party! LOL. I believe because she was involved with deciding when she was ready to get into that “big girl” bed, she didn’t have trouble adjusting to the new bed, and didn’t seem to mind that she didn’t have a crib anymore.
I hope this helps you at least a little,
Aloha
E. C