This came from the My Little SnugaMonkey™ Deluxe Newborn Rock 'n Play Sleeper (Target) Foldable Rocker, though it will work for some other Rock n Play models too.   It is the padded seat cushion insert for newborns.  Listing is for part only as shown, nothing else is included.  Good condition.   From a non-smoking and pet-free home.