The hat itself contains objects that become visible by pulling the rabbit out of the hat.
Sounds like a gum ball machine
The objects that show up are not considered to be food.
You can consider them as eating utensils.
Again a question of its size....
door stopper? 🙂
Anything can be used as a door stopper.
Not used to make ball bearings, but on a side note that process is pretty cool. They just tumble the balls through specific sized grooves and this breaks off all the edges until you get the prefectly round balls. This explains it well.