Vault Boy is the mascot for the Fallout franchise. In game he is the mascot for the Vault-Tec corporation, used in promotional material for their manuals and training films. Do as Vault Boy does and you'll be just fine. This is the Vault Boy Pop is representing the toughness perk that you can buff up on your own character.
Item will be well packed and shipped in a cardboard box to minimize the risk of damage in transit.
This is official Fallout 4 merchandise.