Too cool. Most of my meteorites are in their raw form. If your kids didn't tell you the full story, what you have there is a slice from an iron meteorite, that has been treated with acid to make the crystalline structure visible. Really nice gift!
I don't have any children that I'm aware of. My brothers and I are taking my father out for dinner tonight after he closes his shop.
I did some research and it's part of the Gibeon Meteorite, prehistoric impact, discovered in 1836 in the Kalahari Desert in Namibia. Possible origins are the Moon, Mars, the meteor belt between Mars and Jupiter