you need a place in the cellar
where you can mount a piece of plywood
with an old rug nailed to it...to
absorb a bb shot so it doesnt bounce back!
then you need some special flip over when hit targets
like any shooting range has.... with scores on them
and a place to keep score.
a place to mount paper targets....

they used to make bullet traps
it was like a square funnel gismo...
a place to post firearm safety rules!
the gun is always loaded even when completely
out of bb's deal...
and never be pointed at each other thing ever!
(or risk loosing it altogether)
and shooting glasses for safety...just in case.