Wing Cap
The Wing Cap is an item found in Super Mario 64 and Super Mario 64 DS. When wearing a Wing Cap, Mario has the ability to fly. Mario must perform a triple jump or be shot from a cannon to begin flying. To obtain the item, Mario must find a red ! Block and hit it. A Wing Cap will then pop out of the ! Block.
It is of some interest to note that when Mario obtains a Wing Cap, the music that begins to play is the same tune as the music that plays when Mario acquires an invinciblity Star in the original Super Mario Bros., but with an added melody. A version of this same melody appeared in Super Mario World 2: Yoshi's Island, when Baby Mario got a star.
Trivia
In multiplayer mode in Super Mario 64 DS, there's a course that has an item box in it. When you hit the box, out comes a Wing Cap. Since the players can be Yoshi or put on the Wario or Luigi cap, they will be able to use the Wing Cap just like Mario does. However, it only works in multiplayer mode.