I recently bought my precious godson/nephew cufflinks for his baptism (he was 6 months). I bought ordered some monogram sterling silver ones from blue nile.
I still have and wear a necklace my godfather/uncle gave me at MY christening and I wore that necklace to my godson's christening. I wanted him to have something similar to always keep. (I also threw in a silver polishing cloth in case of tarnish!)
As the baptism fell around christmas, I also bought an ornament with baby's name, church and date for my sister. Funny story - this was during the crazy NE blizzard and they postponed the baptism, so I had to reorder it, and my mother had to reorder a personalized frame she had made! Next time, no dates!