Fungus Deal

 refers to an unmarked and repeatable quest in Fallout 3.

Talking either with Lucy,Little Lamplight's doctor she needs Buffout or Eclair, Little Lamplight's cook, reveals that he is in need of Strange Meat. Eclair explains that there is a fungus which grows in the cavern's pools which makes up an important portion of the children's food supply. This fungus seems to thrive on meat, especially Strange Meat, a discovery the first children of Little Lamplight made when they threw the bodies of dead adults into the pools. Lucy needs Buffout, from which she can derive a useful treatment for the rickets. Little Lamplighters are subject due to malnutrition and lack of exposure to the sun.

Although the player must get Mayor MacCready to agree, need at about 50 in barter or Child at Heart perk to make him agree. Eclair and Lucy will both trade one unit of Cave Fungus for three pieces of Strange Meat or three Buffout. With the Child at Heart perk it will be one piece of strange meat or buffout for one piece of fungus. The fungus removes 10% of radiation in addition to heal the player with five hit points.