Maybe you should get a dog, instead. Dogs make you feel safer in your home, for some reason. Burglars don’t like homes with dogs.
At least the kids could play with the dog; you wouldn’t want them to play with the gun.
I had a dog who taught me many important life lessons, and changed the course of my whole life. She taught and rewarded my kindness, generosity, enthusiasm, loyalty and affection, until they became life habits.