My girls are 8 and 3. I don't have a problem with either one on the top bunk. My oldest sleeps up there but the youngest will go up on occasion to play up there with big sis. The problem I have is my 22 month old going up there. So, in the morning once everyone is up, I take the ladder off and lay it across the top bed.I also got the kind of bunk beds that can separate into twin beds so if it didn't work or we wanted to change things up a bit we could.