In Final Fantasy 1 when you're on a ship hold A and press B 23 times and the slider puzzle will come up.
I'm pretty sure these are all of the prizes
30 seconds or less: X-potion
30 seconds to a minute: Dry ether, Elixir, Emergency Exit, Hermes' Shoes, Remedy
1 minute to 2 minutes: Blue curtain, Blue Fang, Red Curtain, Red Fang, White Curtain, White Fang, Cockatric Claw, Spider's Silk, Vampire Fang
Over 2 minutes: 100 gil, Antidote, Echo Grass, Either, Eye Drops, Gold Needle, Pheonix Down, Potion
Added by: mynameismyname Dec 29th 2006, ID#10050