Do not even try roblox!
This game has many levels of paid subscriptions, and many, many greifers, so you can basically do nothing without it getting messed up.
They have a ingame currency shop(currency is expensive in real money) Cash Shop.
Also, just to note: I have gotten a virus from there that crippled one of my computers.
It requires a through understanding of scripting, which is a huge negative.
They "Say" it is for little people ages 9 and below...
But, how are they supposed to know how to code?
Bullseye55