Mac60 I like the idea of your grass carpet! I don't see why I can't use it right over the mulch. I use engineered mulch, I can't stand the pea gravel it gets tracked in or the babies are always eating the stones. I checked into the rubber mulch but it is exorbitant in price plus I worry about the babies eating it too. I guess I'd rather have them eat a tree rather than rubber, lol. I have 12 inches of mulch under the play structure which is conforming with the federal guidelines concerning the height of the fall zones for my equipment.

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