Question: what do the bobbleheads do in fallout 4?
Answer: Fallout 4. As in Fallout 3, each bobblehead increases a corresponding S.P.E.C.I.A.L. stat permanently by one, and can be stored on a bobblehead stand crafted at any settlement, or on the one in a room in Vault 81. Bobbleheads that previously increased a skill now grant a permanent unique perk.