You can use this app to get a random number with random balls .
You can add force to the hollow glass ball while getting balls .
All balls are moved under the control of the physics engine .

There are 152 balls (0-99,a-z,A-Z) , you can put any balls you want in to the hollow glass ball ( use alphabet ball need to remove ads ) .
You can get at most 8 balls from each hollow glass ball .
You can use at most 7 hollow glass balls in a row .

PS: The result from this app is for references only .