Answer:
The ball drops when the clock hits this.
What has to be broken before you can use it?
When one does not know what it is, then it is something; but when one knows what it is, then it is nothing.
These are great, floaty fun until they explode and give you a little scare.
It get wetter and wetter the more it dries
I am a animal that is cute but dangerous, what am I?