Whenever my son decides to go off into another room away from me, I am always comforted by the noises, knowing that he is keeping himself occupied. It is when it gets quiet that I get concerned. In a general sense, when he is quiet, it means he is standing on the dining room table with salt and pepper shakers in each hand and a pile of each on the table or floor below, or has made it into the bathroom where we keep the dog food and has strewn it across my entire kitchen floor and then dumped the water dish all over it as well...so when I had gone upstairs for a few minutes and he followed me upstairs, I knew I had nothing to worry about...until I realized he wasn't in the room with me anymore. I went looking and it was too quiet for comfort, so I ran down the stairs only to find him just like this =) He was sitting there like a perfect little angel!