In "The Lovely Bones", what was in Susie's box under her bed?

What you
are referring to is the boxspring of Susie's bed.  Tucked up in there, wrapped in a
handkerchief, was a bloody twig.  The twig had been the one that had gotten stuck in Buckley's
throat when Susie was babysitting.  She kept the twig as a reminder of how close she came to
losing her brother.