The Legend of Zelda: Ocarina of Time/Item Trading

In Ocarina of Time there is one main side quest. It's a long long chain of item trading. Get item A bring it to person A and he'll trade you for item B. It continues on until you get the legendary Biggoron Sword. The quest is livened up by interesting items and time limits.

Pocket Egg
Talk to Anju (the lady allergic to chickens) as an adult. She will give you the pocket egg to take care of. Wait a day for it to hatch or just play the Sun's Song a couple times until it hatches into a Pocket Cucco

Pocket Cucco
Take the Pocket Cucco to Talon (the nice guy from the ranch) he should be sleeping in one of the buildings in Kakariko village. Pull out the Pocket Cucco and it will crow and wake him up. Take the Cucco back to Anju and she'll trade it for Cojiro a rare blue chicken.

Cojiro
Take the Cojiro to the slumped over man in the lost woods. He will trade the Cojiro for an Odd Mushroom.

Odd Mushroom
Take the Odd Mushroom to the old woman in the blue potion shop in Kakariko Village. She will trade it for Odd Medicine.

Odd Medicine
Return to the place where you traded the Cojiro. A Kokiri girl will be there. She takes the potion but gives you the Poacher's Saw.

Poacher's Saw
Go to the carpenter's tent in Gerudo Valley and trade this to the bald guy for a Broken Goron's Sword.

Broken Goron's Sword
Take this up to the Biggoron on top of Death Mountain. He will trade the broken sword for a prescription.

Prescription
Take the prescription to King Zora (be sure to unfreeze him first). The king will take the prescription and give you a perishable Eyeball Frog.

Eyeball Frog
You must give the frog to the professor in Lake Hylia before time runs out. DO NOT WARP THERE, your clock will go down to one second left if you warp. If you can get it to the professor in time, you get some Eyedrops. If you don't make it, you automatically go back to Zora's domain and must make the Prescription transaction again.

Eyedrops
Now you must get back to the Biggoron within the time limit, again DO NOT WARP! When you give him the Eyedrops, he gives you a Claim Check.

Claim Check
Either sit around patiently for three days or play the Sun's Song six times and talk to Biggoron again. When you do, you get the Biggoron's Sword.

Biggoron's Sword
Probably the sweetest blade this game has to offer, the Biggoron's Sword it twice as powerful as the master sword. It takes two hands to wield just like the Goron's Sword, but this one doesn't break on you.