The Kid-Kidnapper

 refers to an unmarked quest in Fallout 3.

Once you have been to Little Lamplight, you have the option to talk to Eulogy Jones about kidnapping one of the children there which in turn nets you this assignment. Convince Bumble in Little Lamplight to follow you to the Child Slaver waiting outside, either by passing a Speech check or by using the Child at Heart perk.

Reward
Eulogy Jones rewards you with the Boogeyman's hood.