I have a bad feeling. And I usually don't post speculation to these threads, just read them.
When my DD was seven, she got mad at me and " ran away". I looked out the window. There she sat at our property line, at the and of the driveway, wearing her backpack(she had packed it with her favorite toys and a few snacks). I sent one of her brothers out to ask her what she was doing. He came back and reported that she was mad atme and running away. But that was as far as she could go because she wasnt allowed to get on the road or leave our yard w/o permission. I watched while she sat there awhile, then sent him to bring her in. She flounced off to her room and sulked a bit, then all was good in her world. And THAT is how a seven year old runs away!