Make note of what the child does with the objects
Does the child bang the objects spontaneously?
Does she seem to be trying to find out what kind of sound they make?
Make sure the objects are safe for children to handle--too large to choke on, no sharp edges, etc.
The variations are endless, of course! You could add new things to the box every week.
You could create noise "categories" and put all the bells in one box, all the shake-shake toys in another box, all the hollow toys that are fun to hit with a small stick in another box,etc..
Young children are learning that they can "make things happen." They enjoy the cause and effect of making noises. This is also a language or a sensory activity.