Reporter: Very nice to meet you. We knocked on doors on an all-american New Jersey street to ask neighbors and friends, do they ever talk to each other about gun safety and children? I wouldn't know... See More
Reporter: Very nice to meet you. We knocked on doors on an all-american New Jersey street to ask neighbors and friends, do they ever talk to each other about gun safety and children? I wouldn't know and no one has ever asked me. My children's friends' parents I don't call them when they say let's have a play date and ask, do you have a gun in your house? Reporter: Some of them told me it's kind of private. Guns are never brought up. It's suburban usa we don't talk about it. When it comes to swimming pools we put Gates around them. I think parents would be surprised to see which friends. One parent and parent of three older children agreed to come with us. To talk about something they never did kiss ud. I don't know if Rodney has a gun. He's my neighbor. I have rivals and handguns. Reporter: If I asked you to show me where you keep them? I wouldn't. Reporter: None of my business? Yeah, I guess so. Reporter: From another room, the mom of the family, who didn't want to go on camera, told us she's not entirely at ease. I'm not completely comfortable. I would like everything to be secure, and away and locked up. Reporter: Young boys playing upstairs, the daughter comes down. But a conversation about neighbors and gun safety is one thing when I knock on the door and it's quite another when they do. Do you have a few minutes. I want to talk to you about guns. Would it hurt to ask them if they had guns and if they're locked up? I mean, what's the worst they can do? Reporter: Christine and Ron holt lived on a quiet cul-de-sac. Their son Brandon loved to play next door and they knew their neighbors liked to hunt but never asked about guns. Last April, the neighbor's 4-year-old child got a hold of his father's .22 caliber rifle and accidentally killed their son. The neighbor who owned that gun, is now facing a possible trial and 50 years in prison for endangering the welfare of a child. But it doesn't help the Holts who can only knock on the doors with what they believe is the answer. I think, if we could just get one person who doesn't lock their guns up, to please lock up your guns. Because you can't teach a 4-year-old not to touch a gun. They're 4. Reporter: One answer from the Holts, as parents across this country will have other things to say when they get the conversation started. I don't think that's a bad idea. Reporter: Maybe we will start that tonight. Talking about all of our children playing together. Curious, happy children, everyone wants to be safe.
This transcript has been automatically generated and may not be 100% accurate.