targets

[Brian the brain]

No that was only used once as a stop for the pump handle.

Not very effective either.
It kept going..

[sniper hero]

I can stop a marble with my face...........................once
try old toys, sheet of metal or glass bottles (wrapped in platic foil to keep the glass together) and very nice a flying frisbee (big place needed since if you focus on the frisbee you can forget what's behind)