Roblox is an online game and app with lego-like characters and millions of digital worlds to explore.
Inside Roblox, a free to play game, you can create an avatar and bring your character into many environments starting from tropical islands to haunted castles and bustling towns. While chatting and interacting with other players, you can take part in egg hunts and the game will pay you real money in-game currency called Robux to buy clothing and weapons for your avatar.
You can also get a free hoverboard just by chatting, as you can see in this video:
Roblox has this detail of never-ending discovery because independent developers create more than 20 million new video games for the platform during one year. Roblox is also a great space for education, specifically with in-character mastering and socializing curtailed.