I've been innovating a good number of moonbases on this link
Roblox is great fun and is worth playing ALL the time! have a try!
In roblox you have to build things in your place, play other peoples games, enter building contests, buy things with tickets you earn daily, and LOADS more. If you dont believe me click the link at the top of the page and see for yourself! and after all... ITS FREE!
If you find you have mastered your place then you can simply upgrade to builders club, turbo builders club, or ever Outrageous builders club, give it a go and see!!