Bear Necessities

 is an unmarked quest in Fallout: New Vegas.

Quick walkthrough
Talk to Lindsay, a child Boomer at Nellis Air Force Base. She has lost her teddy bear Mr. Cuddles. The player can agree to look for the teddy or ignore her.

When looking for the teddy bear, it can be found inside the Nellis Hangars among a stack of containers.

Upon returning, the player can tell Lindsay that Mister Cuddles is dead with speech check of 60, which results in Boomer Infamy and loss of Karma. Or give her the bear, in which case she will be very happy and Boomer fame is gained.

Detailed walkthrough
Head into the Hangar where Loyal and Jack hang around. There will be a large circle of crates next to the benches near the entrance. Walk around these and look through the corners until you find Mr. Cuddles. Take him back to Lindsay (she could be in one of the living barracks or in the schoolhouse) and speak to her. At this point you have the option to lie and say Mr. Cuddles is dead or just give him back to her.

Behind the scenes
The name of the quest "bear necessities" is likely a reference to Disney's movie "The Jungle Book", where "The Bear Necessities" is a song.

This unmarked quest may be an homage to the Fallout 2 unmarked quest Find Mr. Nixon in Vault City, where the player has the 'good' option of returning the toy back to the child who has lost it, or the 'bad' option of either saying that it's dead (Fallout New Vegas) or ripping it apart (Fallout 2) - both resulting a karma loss.