Save my Grass!

So I have fresh, brand new grass. I have three concrete slabs forming a walkway from my concrete patio, to my shed (about 6-7 feet). I didn't mind them on the grass before the new grass came in because I had I had NO grass!! It was alllll weeds!! But now with the fresh grass I don't want it to get killed. Anybody know how I can use these slabs (or any other ideas?) without laying them directly on the grass?

Thanks!

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