Club

Clubs were weapons used by the local Caveman at Wasteland they are usually made of wood and occasionally constructed of rock, clubs have been used in many Martang and Bob episodes, clubs are also used to show a cavemans effection for another, don't ask me why.

Behind the scenes
Clubs have changed designs frequently, it has not been determend where they really came from but it is hihgly logical that they first appeared in 0 Bob the episode designed to look like its older than the rest but was made after all the others.