Postcard location and Prizes

1. Go to the Item Shop and jump and hit the fan on the ceiling.
2. Blue Trinity near the Item Shop in District 1.
3. Jump up to the awning of the shoe store in District 2. First you have to jump on a post beside it.
4. Climb to the roof of the Accessory Shop.
5 and 6. Cast Thunder on the wires in District 3, then step on the three buttons in the Gizmo Shop to set it in motion. Examine the clock on the wall to get two postcards.
7. Crack open the blue safe in District 1 after finishing the area the first time.
8. After locking the Traverse Town Keyhole, look at the paper on the wall in the Synthesis Shop.
9.Climb to the top of the Gizmo Shop, follow the path from roof to roof, and take the secret entrance to District 3. There's a postcard in the corner there.
10. After clearing Monstro, Geppetto sets up shop in District 1. Go look in a pot on his shelf for a postcard.

The Rewards

1. Cottage
2. Mythril Shard
3. Mega-Potion
4. Mega-Ether
5. Mythril
6. Elixir
7. Megalixir
8. Orichalcum
9. Defense Up
10. Power Up