A Jet Pack for Christmas?

As a mom I think I know what my kids would like for Christmas.  I pay attention to the things they talk about and play with, but I was not expecting Grace to answer very decisively "a jet pack", when I asked her what she wanted for Christmas.  I responded by explaining how expensive they are and that only adults can fly them, "what else do you want," I asked.  Looking back I realize that this was a very unimaginative answer, especially after noticing that the thing they were having the most fun with was a cardboard box or in a child's mind: a tunnel, a slide, a car ramp, a race car, and I'll bet, could even become a jet pack!