Turned a pallet into a huge ottoman. Found the foam after someone moved and was going to throw it away (yes, I cleaned it very thoroughly). And I used an old quilt as the cover over the foam. I only tucked it under the foam so I wouldn't have to damage the quilt and can wash it or use a different one :)
Pallet to ottoman photo tutorial: Attach 1" or 2" foam to top and sides of pallet with spray adhesive. Center pallet on fabric being mindful of pattern. Working from centers out, stretch and staple fabric to the underside of the pallet, saving corners for last. Neatly pocket fold corners and staple. Attach ready made legs from hardware store with L brackets for stability. Done!