Go to www.amazon.co.uk and select “Sign in”.
Parental Controls & Settings guide
Amazon Video parental controls give you the ability to set restrictions for the video content that can be purchased or viewed on your connected devices. You are required to register an account and log in to each device before you can stream content.
You will need to have registered an Amazon account and enabled Amazon Prime. To set a PIN you will need your Email address and password to access your account.
Here are more resources to help you keep your child safe online.