I don't know where the idea came from and I don't know whether it is feasible, nor how I would tackle it but .......................... as I have a huge area in the back garden that is unusable because it is covered in gravel (guy before me had lorries), I DID wonder about constructing a maze for the grandchildren with all those water bottles I have accumulated. I think it was a Grand Designs programme last night that made me think of it - they had a large area of grass mown so that it was laid out in concentric circles. I'm sure I've seen a grass maze somewhere too - any ideas on whether it's worth trying and how to go about it?