How about Astroturf?
Or if that's too spendy, old carpeting?
And if there are areas you don't want trodden,
put old appliances or plumbing fixtures there.
Go full blown Sanford & Son.
When we had our stove replaced, I was muttering about not knowing what to do with the old one. A friend paused and said "If you want the socially acceptable answer, you should probably take it to the dump. If you want my personal answer, you should put it in the front yard and slap a Lynyrd Skynyrd poster over the front, and hang a rebel flag from it." I had a good laugh, but told him I wasn't partial to either Skynyrd or rebel flags, but I could do an Ozzy poster and a British flag instead.
Husband wouldn't let me, though.