Oz and Nz

I made Sarah's day by slipping a note and two chocolate chips under her door during quiet time.  My note said, "Dear Sarah, here's a little treat for you.  Love, Mom".  She read it out loud and let out a little squeal.  Then a note arrived under my door.  It said, "Mom I hav sum oz and nz for you".  It came with some cut up scraps of colored paper.  I studied it for a long time but couldn't figure out what the oz and nz could be.  I asked her later, and she explained that it was "odds and ends".  :)