Poor old Mark.  This is how I found him the other day....while I was making supper, he was thinking about doing his business.  Not quite what I had in mind, but to him this was a much more comfortable arrangement.  I guess he was just sitting in the chair waiting for something to happen.  I encouraged him to read a book and so he was deeply engrossed in the cover of his Wiggles CD.  He was a bit fed up that this whole thing takes way too much of his play time.  Sorry son....what goes in must come out.  Some days are just like this...nothing happening.  More fruit and oatmeal cookies are required to get the job done...better luck tomorrow!