A signpost.
Signposts are a gameplay element of Black & White. They are simple, wooden signs with a white question mark painted on them. This signposts can be right-clicked by the player and they will display a text of useful information about some game element and right clicked once again to hide that information.
They are normally positioned near something that is related to the tip they contain (such as a signpost with tips about the village store, being situated near a village store).
Signposts that haven't been clicked before are always spinning. After a signpost has been clicked, it will stop spinning and will always be facing the player, no matter from which angle they look at them.