In just under two months, a Roblox user-created game called Grow a Garden has become a massive hit.

Like YouTube, Roblox started as an online stage for young creators. As the company grows toward 100 million active daily users, contributors are making big money selling games.

Roblox farming simulator Grow a Garden is eclipsing active player numbers achieved by some of the most popular games on across PC, mobile, and console – so what exactly is it?

On Saturday, more than 16 million people were planting seeds and collecting exotic pets within Grow a Garden at the same time. Many were not yet teenagers.

Learn how to set up a Roblox account, where to find stuff in the app, what types of games you can play, and what exactly Robux are.