This was a great idea for a thread, so I bumped it for this year. (I would have done the same with “
What did you get for Christmas?”, but someone started a new version for 2010.

)
For my older younger brother I got an ammonite fossil and materials for his rock tumbler, including three pounds of agates.

I also made him a Christmas card designed to look like an agate.
To my youngest brother I also gave an ammonite (an iridescent one from Madagascar), and William Strunk, Jr's
The Elements of Style. (He had earlier expressed admiration for my writing abilities, so I thought it would be nice if I could help him boost his skills in that area.

) I made him a card with a picture of a stingray and a platypus on it.

For my sister, a cap with a Goomba (from the
Mario games) on it.

Although she had told me that she had seen it in a store and really liked it, I was concerned that it wasn't much of a gift, so I made her a very elaborate card featuring several video game-style creatures (most of which I invented myself). I'm happy to say that she was very pleased with both gifts. :^.^:
I got my mom a piece of pyrite carved into the shape of a heart, (a literal “heart of fool's gold”

). She had seen it in the local rock shop when we went there to go Christmas shopping, and liked it so much that I practically had to tell her I would get it for her to keep her from buying it for herself right then and there. I gave her a card designed to look like a stingray.
For my dad, a book:
The Elements: A Visual Exploration of Every Known Atom in the Universe. (He's into the physical sciences). I was running out of time and ideas at the time I made his card, so his just had brightly colored stylized text, which, as with all of my cards, I improvised myself.