Tiny gears are scattered all over the world on the ground. You cannot see them, but if you go near them you will automatically pick them up. If you get 30 of the 32 tiny gears and return to the house on the snow plain with a big snowman in front of it, the man inside will give you the "Sword of Gear". It has Attack +50 and Defense +10. If you keep talking to that man after you get the sword, he will tell you about the Turtle and the Pebble.