cd- removing and keeping it back

We were quite worried C would damage all the CDs we have if we arrange them on our open shelf for quite sometime. Yesterday we bit the bullet and arranged it and asked C not to touch it. C was fine for some time. But later, she pushed all the CDs to the floor. I sat next to her and made her arrange all the CDs on the shelf again. C did it patiently. But after some time, she thought it was a game and started taking off the Cds one by one!