Algodoo

Scripted, you can copy paste the code ("for(//number//, (i)=>{" indicates the number of copies):

(e)=>{
for(20, (i)=>{
scene.addcircle({
radius := 0.1;
density := 10;
restitution := 10;
pos := e.pos;
oncollide := (e)=>{collisionset = 2}
})
})
}