Vault-Tec bobblehead figures are promotional Vault-Tec items in Fallout 3 and Fallout 4. Although found in the game files, Vault-Tec Bobbleheads do not appear in Fallout: New Vegas.
Bobbleheads are only encountered within the Capital Wasteland and The Commonwealth and not, for example, in any of the other Vaults of the West Coast. This may suggest that the Vault-Tec bobblehead range was an exclusive item to the East Coast and not a line of permanent Vault-Tec merchandise. The idea of the bobbleheads being a piece of exclusive Vault-Tec merchandise is supported by a computer terminal found within Vault-Tec HQ. The computer provides a list of ‘orderable’ merchandise such as clothing and lunchboxes, but when a bobblehead is requested the terminal reports that they are only available to executive staff. However, a letter from Vault-Tec (addressed to the Gomez Family who also appears within Vault 101) can be found in a mailbox in Springvale that says “Be sure to present this letter to your Vault-Tec representative to receive your special, commemorative Vault Boy bobble-head toy!”.
Twenty bobbleheads can be found in the Capital Wasteland. Once found, the bobbleheads can be stored on a Bobblehead collector’s stand in the Megaton house or in the Tenpenny Tower suite. Typically, they are acquired through console commands cannot be put on a stand, and do not count towards any of the bobblehead-related achievements.