Lego gets everywhere.
And the boy struggles to put it away, as he gets distracted and starts building.
So, I dug out some wierd denim with brown rough velvet finish on one side from my stash (unwisely bought online, it wasn’t what I expected).
Cut a square of it the width of the fabric, then made that into a circle. Left hubby adding eyelets while I went babysitting. Zig zagged around the edge to stop fraying and avoid faffing with a huge circular hem. Found some wierd pink twine stuff (it’ll do for now, couldn’t find anything better in my stash) and a slider thingy of a bag and voila, a lego playmat was born that can be drawn up and put away with the lego still inside it.
Of course, the lego will still be everywere, but you gotta try.