Packabell requires you to pack five pieces in the bell so that it can be hanged upside down without any piece coming out.
In the center is a real moving clapper,...Show more not only to sound the bell, but also to make enough space for the pieces to be inserted. That being said, as the bell fills up the clapper's moves become quite restricted and so does the possibility of aby inserting new pieces.
Before use pls. read the assembly instructions attached in the product images.