Prime Kindergarten

The Prime Kindergarten, sometimes referred to simply as the Kindergarten, is an abandoned Kindergarten facility located on Earth in Facet Five. It first appeared in "On the Run". It is notably the site of Amethyst's creation.

Appearance
The Prime Kindergarten is a vast, foggy canyon with numerous holes carved out of the dark, dull purple rock faces; which are the "birthplaces" of many Gems. Injectors dot the landscape, some of which have fallen to the ground and been destroyed. The site has a single Warp Pad, which is decoratively surrounded by gems similar to those on the Injectors. This was the first Kindergarten to be developed on Earth and has significantly better conditions than the Beta Kindergarten.

Description
The Prime Kindergarten was once a thriving Kindergarten containing rich minerals perfect for growing new Gems, specifically those of the Quartz variety. However, due to the Rebellion, this facility was shut down.

Once Earth was deemed unsuitable as a colony, Homeworld Gems began their project to create a massive Gem geo-weapon known as the Cluster. While it was not inserted into the mantle through the Prime Kindergarten, a vast amount of prototypes were left here to eventually emerge thousands of years later.

Underneath ground level is the Prime Kindergarten Control Room which has the ability to reactivate the facility, check on all equipment, and access the Cluster prototypes. While the rest of the facility is broken down, this room remained untouched due to the Crystal Gems having no prior knowledge of its existence.

"Warp Tour"
Peridot briefly mentions re-activating the Kindergarten manually but is interrupted by a Flask Robonoid. After finding Steven's Crying Breakfast Friends sticker, she returns to Homeworld.

"On the Run"
Amethyst introduces Steven to this location. She reveals that she was made there and that Gems used this place to create other "bad" Gems, or "parasites".

"Marble Madness"
The Crystal Gems follow one of Peridot's Plug Robonoids here. They later cut Peridot's connection to the control room, at the cost of her discovering their existence of on Earth. Pearl mentions the Kindergarten has been inactive for 6,000 years and would destroy all life on Earth if reactivated.

"Keeping it Together"
The Crystal Gems go to the Kindergarten to search for Peridot. They find her, but she quickly escapes. Upon further investigation, Garnet discovers that Peridot wasn't trying to reactivate it, but instead she is checking on Cluster Gems, former Crystal Gems that Gem Homeworld shattered and forced to fuse, possibly as punishment for the Rebellion.

"When It Rains"
Peridot shows Steven to the Kindergarten to give him more information about the Cluster, as well as referring to it as the "Prime" Kindergarten. She assumes, since he is a Quartz, he is made there as well, only to learn about his hybrid status instead.

"Too Far"
Peridot, Amethyst, and Steven retrieve a drill head from one of the Injectors to use on their drill to the Cluster. Peridot also tells Amethyst about quartz and classifies her as a defective quartz.

"Buddy's Book"
Buddy Buddwick begins to explore the marked areas Pearl had marked for him to stay away from, starting at the Sky Spire, the Lunar Sea Spire, the Communication Hub, and then the Kindergarten. He draws down the holes made from formed gems, and names the place, "The Many Hole'd Place" in his journal. Buddy feels a bit "off" about his journey until Amethyst comes onto the scene behind Buddwick. He shows Amethyst his accomplishments on the map, journeying to places unseen. However, from the looks of the Kindergarten, many people have been here, and since Amethyst's compatriots drew his map, he comes to realize he is merely a tourist rather than an explorer and adventurer and weeps over it. Amethyst suggest discovering the "Sand Castle" located in the arid environment known as The Desert. This brings back Buddwick's enthusiasm and begins his travel to the Sand Castle.

Trivia

 * The area was stricken barren of life by the incubated Gems around 6,000 years ago, as stated by Pearl in "Marble Madness".
 * It is unknown how many Gems were grown in the Kindergarten, and where most of them currently are.
 * Amethyst was grown at the Prime Kindergarten but joined the Crystal Gems sometime after the Rebellion.
 * Amethyst's hole is one of the few holes at ground level.
 * This is because she emerged 500 years later than all the other Gems grown there.