Well H., my daughter wasn't much younger than yours when I put her in her toddler bed. I was tirec of her being in my bed, cause she wouldn't sleep in her crib. She was afraid of it for some reason. She has done great in her toddler bed since we put her in it. A few months ago she fell out for the first time, because she scooted way down (and like your little girl mine too is tall) and ended up rolling off. She fell may a foot to the floor though and was fine. She got up, came to tell me what happened and we went and tucked her back in. It was funny since she wasn't hurt. I say give it a try, she might like it better than the crib, being a big girl bed and all. That's how mine fell for it. LOL