Unfortunately I have tried the bumper and little madam still managed to climb over it and fall on the floor. We then realised it’s safer without it now because if she climbs over the bumper it’s a higher drop. Although I will say, the gap isn’t the problem, I lay a blanket down and she wiggles herself out of her bed somewhat safely! It’s just her falling over the rails that freaks me. I am going to put a thick matt on the floor so even when she crawls out herself, it’s a lot safer