Fluke? or intentional?

For the second time this week I woke up to the sound of the mobile hanging over Morgan's crib. This happened once before a few weeks ago, but at that time I was convinced that she had hit the button by mistake. This week I'm not so sure.

I find it hard to believe that she is purposely hitting the on/off switch on the mobile but I'm not sure what else to think when she turns it on herself and then happily chills out by herself in her crib for 15 minutes. I figure the real test will be if she turns it on more than once in a morning.