The workplace, if you are curious, is (not surprisingly) the Guardian's G2 office!
In the main the article itself - Kids at work - focuses on describing what went on that day and how the experiment went for the adults and kids involved. Probably what is most noteworthy are the opinions of the participants. For reasons related to space I've provided a few (shortened) quotes from a rather long article (note that the article comes in four parts - see links at bottom of main article)."I think that is fantastic and very good for us, like being invaded by a different species ... our own former selves" (Parent).
"It was even worse than Bring A Dog To Work Day" (non-parent).
"I don't think they work very hard in the Guardian office" (child).