The first one is at the top on Death Mountainand gives you the spin attack for your sword
The second one is in the Hyrule Castle Gates and gives you Din's fire
The third one is in Jabu-Jabu terriotory and gives you the Favore's wind
The fourth one is outside the spirit temple and gives you Nayru's love
The fifth one is in the Death Mountain Crater right next to the entrance to the King's throne room and double's your magic meter.
The sixth fairy is outside of Ganon's tower. Get the Golden Gauntlets and go to the big gray pillar where you got Din's Fire when you were younger.