Deku Nuts were one of the first weapons Link acquired. Unlike many of the weapons in the game, the Deku Nut could be used by both child and adult Link. The best way to harvest Deku Nuts was to destroy Deku Babas. Sheik also used Deku Nuts to seemingly vanish (as the flash the nuts create caused Link to look away from her).
The Deku Nut also appeared in Super Smash Bros. Brawl as an item. The DekuNut will explode when thrown and will stun anyone who is caught in the explosion.