Why it's so hard to have a clean house

I had just finished picking up Beth's room, as we are getting ready to re-organize some furniture (putting the bed pictured below into Nora's room and the crib into Beth's room). I went into the living room to feed Beth and Nora went down the hall to get Beth a toy. A few minutes later, I went to see what was taking Nora so long, and below is an image of what I found.