You have to be at least 13 years old to register for an account, or you need to get parental permission. There are no rules against reading or editing wikiHow anonymously, though, if you are under 13.
In accordance to a US child safety law called COPPA, you must be 13 or older to create a Wikia account.
By clicking the signup on the website.
No you can make a wiki or account for free
You don't have to be an adult to have a wikia... But you have to take your wikia site seriously.
Yes
Wikia Answers is run by a website called Wikia. Although it's confusing, WikiAnswers and Wikia Answers have nothing to do with each-other.
Mostly. 99% of Wikia wikis allow you to use the same account. The most notable exception is Uncyclopedia. When Uncyclopedia was founded, it was hosted on its own servers. When it merged with Wikia, it already had a large number of user accounts set-up, and could've had problems with multiple users with the same name had they merged their user databases.
13 to be a member (to create one)
wikia is a website which allows you to make wikis for free, contribute to wikis, read wiki pages and more
In accordance with a US law called the Children's Online Privacy Protection Act (COPPA), websites can't collect certain types of information from users under age 13. For this reason, Wikia doesn't allow users under 13 to join.
wikipedia
Wikia's population is 127.
Wikia was created in 2004.