Gremlins?

We must have gremlins in our house. (Besides the obvious three!) I just spent over an hour going through all the kids DVDs. I have several empty cases with no movies. And another stack of movies with no cases. Where do they go? How can they just disappear? I have checked behind beds, in toy boxes. All the places our little houdinis could manage to hide them. None, nada. I have moved the kid's DVD collection to inside the bottom of the entertainment center and put all my photo albums in the side section on the shelves. I got tired of them stacking stuff to reach the movies and the constant state of disarray the shelves were always in. I am not sure this is a foolproof way of keeping the area organized, but what the heck, it's worth a shot! I have been feeling very unmotivated about keeping the house clean. It seems just as fast as I clean it up it is trashed again. I am sorting through and getting rid of any broken or unnecessary toys. I will TRY to get them to keep more of their things in their rooms. They prefer to play in the living room so they can be near me when I am cleaning or doing things in the kitchen. But it would be easier to keep things picked up if I could get them to help! It is hit & miss, sometimes they do and sometimes they don't. Today I seem to be more motivated, so I will make the most of it!