Observer

An observer is a quest item from Fallout 3 given to the player by Moira Brown during the quest Wasteland Survival Guide.

Related quest: The Wasteland Survival Guide
Moira Brown asks the player to place the observer in one of the 3 batches of mirelurk eggs located at the Anchorage Memorial to observe their behavior. You must then travel to the Anchorage Memorial to do so.