Please take this caution in the right way. I too have told my kids about the Rapture, especially when they would ask about their grandparents dying. I told them that I hoped we'd all go to see Jesus without dying.

Now, my story:

When my grandmother was a little girl (8?) she and her friend came home from school together to the farmhouse. No one was there, which was very unusual. They went out to the barn, all around the fields, and began to worry that the Rapture had happened and they'd been left.

They ran to Grandma's grandmother's house; it was empty. They ran to the friend's house; it was empty. They ran to Grandma's grown-up sister's house and found Naomi. Phew!

They were absolutely panicked! You may want to address that sort of thing.... My mother said her mother had bad dreams for the rest of her life about 'missing the rapture.'