All you really need to make this is a ruled cutting mat, foam or cardboard and a sharp crafts knife. I choose foam rather than laminated cardboard because I can imagine how frustrated a child would get when his mat is knocked and everything slides all over the place after spending hours working on this. I think I will also make another one from very thick card and not laminate it. The only problem I have now is trying to find gold coloured foam and a suitable storage box. I'll upload my own photo's once I get my laptop working again.
Here is a link I found for a presentation of this.