Martian Meterorite

I'm thinking of giving my son a tiny Martian Meteorite for Christmas. It's a very, very small piece — only about 3mm, I'm told — but the box can be opened, and it can be touched and handled. I'm trying to decide if the excitement of having an actual piece of another planet might outweigh the disappointment, for a six-year-old, that it's such a tiny sample. (The image above is actual size, more or less.)

He's shared my excitement as we've followed the various explorations of Mars that have been undertaken since he was a toddler. (We watched the Phoenix landing together this past May.) I'll do just about anything to encourage this interest — even if it means spending $39.95 for a tiny piece of rock!

There are pieces from the Moon available, as well, but they're not that much larger and not all that less expensive. There are also slightly larger sections of meteorites of indeterminate origin, but I think he'd have more of a connection to something that came from a specific location.