Liv has been on a queen mattress on the floor since she was about 16 months old. She started climbing out of the crib effortlessly then, even with the mattress all the way down on the floor, so we had to remove it. We just bought her big girl bed frame, and although the height is pretty low, I still want rails for security. I like the idea of the ones that go under the sheets like this one

http://www.amazon.com/Magic-Bumpers-Portable-Child-Safety/dp/B003KFCV6S/ref=sr_1_1?s=baby-products&ie=UTF8&qid=1370613829&sr=1-1

But my question is, does anyone have experience with either those, or using pool noodles the same way? What do you all use?

Thanks!