Invisible Dog

The other day when Kendra got out of school, she told me how her teacher Mrs. Roy walked in wearing a clown costume and pretending to walk an invisible dog. (Mrs. Roy does this every year and Blake had told me about it when he was in her class, but he just thought it was funny.)
Kendra though started to tell me how she wants an invisible dog, and how well behaved a invisible dog is. She told me how an invisible dog won't run away and it doesn't even poop. Thinking well that's easy.... I said "Kendra you can have an invisible dog". She said, "But mom where do we buy an invisible dog?" Thinking she is just pretending, I responded, "all you need is colar and a leash" Then Joe called and I told him the story about the dog and how Kendra said she wanted an imaginary dog. I got off the phone and Kendra immediately said, " Mom it's not an imaginary dog, it's invisible!!" Opps!! She said she would be very good if she could have one for christmas. Like Joe said later how do we convice her that we bought her this invisible dog.... just buy a colar and leash and hand it to her saying here is your dog????? But I don't know if I want to be seen walking my imaginary dog around the neighborhood, some people mind find me a little crazy!! The things children can believe.