Shoot various size coins at each other and watch how they interact, then try a coin against a wall.
If you have a very slippery surface try making a line of 3 coins (or more if it's super slippery) to bounce against each other.
Shoot various size coins at each other and watch how they interact, then try a coin against a wall.
If you have a very slippery surface try making a line of 3 coins (or more if it's super slippery) to bounce against each other.