If you look at the last picture it shows how the tilt is secured. It uses a screw type friction mechanism to lock it in place; when you tighten the screw it puts friction on the outside sleeve that its in, almost like a shower curtain rod. So as long as you can tighten the screw enough the tilt should lock in place. The table has a 50 pound weight capacity, so long as you do not think she can hit it hard enough to exceed that she should be fine.