Seems to me like it would be a good segue to doing some bonding and/or teaching her about gun safety or about airsoft.
Depends on how old she is though. I'm not a parent by any means so use your best judgement on when she's ready to learn to be responsible (I say around 11-12 would be a good time as they seem to be quite impressionable and is probably the best time to introduce "young adult responsibilities" into their life).
I'm not sure if this is true but I've heard of people putting a bunch of BB's in a bowl (maybe a pasta sieve), putting a bit of dish detergent and water in the mix, stirring it around, letting it dry and throwing out the deformed BB's.
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE