It was always on the table and we only have one table, but then the children hated to clean it up. Or if the Lego was on the floor, my husband would obsess about getting every piece of Lego off the floor every time the vacuum cleaner came out.
In short, I decided to buy one of those cool round storage bags. But I quailed when I saw that even the cheapest one was $50.
I used this pattern. I made buttonholes instead of fooling around with grommets.
However, I decided to make my circle larger than the pattern, and having very little understanding of circle geometry and being slap-dash with my cutting, there are some puckers here and there. Plus, I didn't cut the cord long enough for it to lie exactly flat.
But everyone is happy: no more cleaning up Lego! The children play with it on the circle and pull the drawstring when they're done. It has a nifty slider to keep the cord cinched up. I get a happy little twitch every time I walk by and see the Lego circle helping with housekeeping!