I agree with you, Nam. My children were brought up that way as was my husband was because his father was a cop. Instead hiding it, they were raised to know how to handle a gun and respect it. Both my daughter and son handle guns with ease and respect. Me, I keep a .22 handy for those stupid squirrels. I should learn how to skin one so they don't go to waste.Depending on the age of the little one, and how rebellious in nature she is, it might be well worth your time to have dad or whomever is most familiar with the gun teach her about it, with a very heavy emphasis on safety and respect. I grew up in a household with firearms, and even though they were kept in a locked safe, even if they were not, safety was SO drilled into my young mind by my father that I couldn't even fathom messing around with a gun! I am thankful that my dad showed me guns, drilled the rules of safety into my mind, and made sure that I understood how very serious a gun is and that I must always respect it. In my mind growing up, being safe and treating guns seriously was as important and as impressed in my mind as other important things, such as never going with strangers.
I recall being 12 and hunting with my cousin (both of us supervised by my father), and chiding him sternly when I felt he was not being as safe as he could be.
Of course you want to take other measures to make sure that things are kept safe. A gun safe and/or keeping the ammo in a lockbox that is out of reach are good steps!