Kids in that age group wouldn't last a day on the forums
this.
Also, I think they would be trolled a lot, so its not a very good idea to target it to 5 - 7 kids. another thing is, they would just lack freedom of speech
(They could also be a bunch of loving hypocrites too). for example: "Stupid 7 year old: dont cuss, u fukeng cigarettet." Their server or not. I'm starting to think kids on blockland would be a bunch of bullstuff for a game that swears, I mean, this is a game where its not like Roblox where if you swear, many other people will have a homoloveual shipping with the report button. At least on Blockland, they give lots of freedom other than Roblox. So I would say...
No, they shouldn't be on the game
especially on the forums.