Simple minds, simple pleasures

So Drake begged me to do the "marble game" with him, and so we put this contraption together.  Needless to say, the two of us spent all morning today "racing" our marbles down and seeing who would win.  The first one in usually doesn't make it down the fastest, surprising enough.  There is too much going on with the swirling dishes of chance up above.  The first marble to make it through the second purple swirl wins.  A lot can happen from the initial drop to that point.  Fun stuff.  I think Drake could have played it all day long.  Why is it that such simple things can be so much fun???