Ok here goes. Hopefully I'll have time to post a few more of my experiences.
This occurred in Irving, Tx. in 1981.
There was a group of about 8 of us ranging in age from 6 to about 10. We were all rather adventursome. Some people moved in around the corner from me. We saw them move in, but then we never saw another person again. The lights were never on, no one ever left, etc. This house became the neighborhoods "scary" house.
Even at this young age I felt something very wrong from this house. Well, weeks go by and weird things start happening. We find the full skeleton of a small dog in the ditch across the street from this house. Other area reports include missing animals (to this day I have no idea if the animal part of this story is tied in or coincidental). Noone is thinking much of it. There are whispers but none of our little group wants to appear scared. This goes on for a few months. Finally, we see these people leave. The house was built with a very open design. It very obviously was completely empty. Well, these people left a drive-way sized spray-painted pentagram (not a pentacle... this thing was inverted) on their rear driveway.
We started to walk around the fence line of this house and there were some missing slats. It looked like a junk yard in the back yard with tall grass and weeds. I clearly remember a riding lawn mower, a dining room table, lots of chairs, and a mattress. WHAT A COOL CLUB HOUSE! lol. Well we take it upon ourselves to clean this place up. The olny thing we wouldn't touch was the mattress because it had what appeared to be blood all over the center of it. We, in our infinite wisdom, decided it was Kool-Aid... but we never touched it anyways.
I had a little "boom box" that plugged in so day after day we would go this backyard for hours cleaning and organizing while listening to music (it never occurred to us perhaps the electricity should not still be on). About a week into this, on a warm sunny, summer day, something terrifying happened.
I had the rake and was doin my 7 yr old best to rake up some leaves when I noticed the lights in the house going on and off. I watched for a few seconds until others in our little group noticed. We all stopped what we were doing and grouped up together. The lights went crazy. Everywhere in the house they were flashing on and off. Then a telephone started ringing but it was too loud and sounded like no ring I had ever heard.
About a minute later my boom box started going crazy. At first it sounded like it was changing stations with a mix of static and music. No one was near it... but all were watching from about 5 feet away. Suddenly a voice came out of it, but it wasn't speaking any kind of language I could identify. The voice was very, very deep and the words appeared to be rolling out in a slurred fashion... almost chanting in reverse. I slowly walked over to the box and unplugged it... but it kept on and got louder.
That was it for us. We all left screaming. I left the boom box and everything and never did go back for it. None of us ever went back nor spoke of it again. Thankfully my mother was very open to hearing about what happened, and prayed with me. It was that night she told me that our family is gifted, from as far back as could be researched.