Bobblehead - Explosives is a Fallout 3 item, a Vault Boy Bobblehead. It permanently improves your character's Explosives skill by 10, to a maximum of 100.
Location[]
In the Sealed Cistern near WKML Broadcast Station. The manhole is tucked into the rocks behind the station (see picture on the right).
Video[]
Obtaining Bobblehead Explosives [1]