You know how when sometimes you get nervous if kids are around and it's too quiet? You can also get that same feeling if you start hearing muffled laughs from a five year old and loud laughs from a 7 month old. I still don't know exactly what they were doing before I walked it but I discovered that Holden had decided to join Maddux in his playpen and that they were having a great time. Doing something. Perhaps it's best not to know.