I had an idea while watching this video. If you make the clapper part thin enough to go through the hole you could actually cut the upper part into and then with very thin wire drill a hole in each part and re-attach loosely. Make the whole part long enough and thin enough to go through the hole from the top of the bell and glue in place but leave room to glue the upper part in place. Before gluing make the handle of the bell to finished state. Glue the handle in place. Now you have a bell that has a clapper that moves. There are probably many other ways to do this but this is just a thought I had while watching. Instead of a handle you could just leave it shorter with a hole drilled to allow for ribbon or wire. Thanks for a very good video. Happy New Year.