|Appears in||Chapter 2|
|Tagline||“please wipe your feet”|
|Goal||Android: 30 Goos|
iOS: 36 Goos
|OCD||Android: ≥51 Goos|
iOS: ≥61 Goos
|Objects||Water with two-directional airflow|
|Previous level||Blustery Day|
|Next level||Beauty School|
|“||It only allows meticulously screened Goo Balls onto the main island. You can't be too careful these days! Especially since the power source for the entire world is located somewhere on this island. But... try not to snap the fragile worker cable, it appears to be made from heavily processed Goo.||”|
—the free Sign Painter
Welcoming Unit is a level in the video game World of Goo. It is the fourth level of Chapter 2. In this level, the player must use Balloon Goo and Green Goo to get Dark Black Goo up a gear and through a gate to the exit pipe. This level also features a "Secret Disposal Hole" which will send any Goo that falls in back to the beginning of the level (and is very useful for gaining OCD) and a "Freedom Scraper 3000" which can detach Goo structures that come into contact with the gear on it.
- This level is also called "Immigration Naturalization Unit."
- This is one of few levels where every collectible Goo Ball can be collected in the pipe.