HELP!!! CAN SOMEBODY *PLEASE* TELL ME WHAT to DO?!?!?

I just came home from takin an exam and this little kid across the street was beatin on his door but nobody was answering. I got out the car and asked "are you aight, man?" and he told me that his parents aint home... now i've seen 3 other kids at this house but I've never seen him before. I asked him whats his house number and I'd call on my cell to see if someone was inside, but he was missin the last number. It's kinda cold outside, too cold for a little kid to be sittin out there so I asked if he wanted to come to my house till his parents came home. He nervously said yes, but when I was unlockin my door I could tell he was scared and I can understand that since he's so young and kids is taught not to talk to strangers. I told him if he's scared to come inside he doesn't have to, but I'm not gonna do anything to him and he decided to sit on his porch... but like I said its kinda cold out there, so what should I do???