For free association, you have to visit the official website of Moshi Monsters which is moshimonsters.com.
On the top of the page, you will see a tab of membership. Click the link to start the process.
Under the heading of ‘Why Become A Moshi Member?’ you will be able to see a line ‘the basic version of Moshi Monster is free, click on the sign-up link.
You will be given an option to adopt any one of your favourite pet among the six exciting monsters. Then you will design its colour according to your choice and continue the process by clicking ‘next’ tab.
A page will appear which will ask you to fill in your personal details. The required information includes your name, password, and email address.
You will receive a confirmation mail in your inbox which includes an activation link. Click on the link to enter into the world of Moshi Monsters.
The membership is free of cost, but you will have to pay for the activities which your monster will perform.