The Pantry appears after completing one bundle. Completing all Pantry bundles will restore the dilapidated Greenhouse on your farm, making it available to grow Crops and Fruit Trees year-round.
The Fish Tank appears after completing one bundle. Completing all Fish Tank bundles will remove the Glittering Boulder to the left of The Mines entrance. Willy will also give you a Copper Pan that can be used to collect metal ores and other items from bodies of water.
Note: It may not be possible to finish the Specialty Fish Bundle before finishing the entire Vault section, as you need access to The Desert to get a Sandfish, unless it becomes available at the Traveling Cart.
The Boiler Room appears after completing two bundles. Completing all Boiler Room bundles repairs the Minecarts, allowing you to fast travel between distant locations. The Locations are Bus Stop, Mines, Quarry and Town.
The Bulletin Board appears after completing three bundles.
Completing all Bulletin Board bundles improves the player's friendship rating with every non-datable villager by two hearts (500 points). Note that this applies only to non-datable villagers whom you have met in person. Villagers who do not show on the "Social" tab of the player menu and villagers whose names appear as "???' will not receive 500 points. (If you complete all the bundles before Kent arrives on 1 Spring, Year 2 -- possible by buying a Red Cabbage from the Traveling Cart -- he will not benefit from the friendship increase, and will start at 0 hearts.)
The morning after, Mayor Lewis will send a letter saying that packages containing items posted about "years ago" on the community center bulletin board have been appearing in villagers' homes. He says the packages are all addressed from "your farm". He expresses his gratitude and says "all of us in town are delighted!"
The Vault becomes available after completing four bundles. Pressing the large "purchase" button will purchase the bundle and deduct the gold from your total.
Completing all Vault bundles costs data-sort-value="42500">42,500g, and repairs the Bus Stop. Taking the Bus grants access to The Calico Desert.
After completing the Community Center, the first night before a rainy or stormy day will trigger a cutscene in which a bolt of lightning strikes the abandoned JojaMart, opening its doors. Inside, the Missing Bundle can be found.
1.3: Removed an exploit that allowed some furniture to be used in place of items to fill bundles.
1.4: Introduced the Missing Bundle. Selecting or hovering the mouse pointer over inventory items needed for a bundle now makes the Golden Scroll icon pulsate. Uncollected rewards can now be found in a bundle next to the Junimo Hut when the golden scroll disappears.
1.5: Added the ability to randomize bundles for new saves, stack different quality items, as well as an option to be able to complete all of the bundles in the first year by guaranteeing that the Traveling Cart will sell a Red Cabbage Seed.