The art of storing, arranging, stacking things -- to be cat-bring-it-down-proof -- comes with a real learning curve.
I have to take great care here with things that could be messed up in some way, or especially broken. It requires a fair amount of attention. And unless you have a cat who loves to knock things down (I have one, but I DON'T think Annabelle is one of those), the thing to remember is that in jumping around, they don't know their back legs are going to kick things asunder. It's tough, I know.
Edit: I also know these are not words of genius. I wish I had something more helpful to say, or shortcuts to advise.