We put some out on a Sunday, and gave everyone a piece.  Throughout the service the added their piece, built something, broke it apart, rebuilt it another way.  Some found it frustrating, others kept coming back to fix or rebuild or redefine.  Every colour and shape was included.  Some were nearby but not incorporated but belonged on the table.  Somehow each piece had a place and was necessary.  Like the people in, and around, the church.