Yes, students under 13 can sign up. When signing up, there is a toggle you have to click on if they are older than 13. This is for privacy reasons and to protect students identity and data as we are COPPA compliant:

Under 13 sign-up to Sutori

There are therefore certain actions under 13s cannot do, including making their stories public and exploring content on Sutori.

Here are our terms of use and privacy policy