Bunk ladder/safety rail

We made a climbing wall with a package of the plastic holds from the orange big box store. We used play ground handles on both the top side and edge of bed. We put a pool noodle under the sheet and used Velcro to attach it to the mattress pad. Our son was six and he loved it. He used it for three years until we switched trailers. I have also seen ladders made of 3/4 or 1 in pvc pipe, end caps, and pvc Ts. This ladder can be made as wide or narrow as you desire. You could also add some elbows to make it hook on totthe top of the bed. We tried this first, but then saw the rock wall on a home bed and made the change. Good luck.