Get an Apple ID for your child - Apple Support

How to Create An Apple ID for Your Child

How to Create an Apple ID For Your Child

Setup basics - Apple Support

Set up your iPhone or iPad - Apple Support

Help a friend or family member as their account recovery contact - Apple Support

If you can't find your family's shared apps and content - Apple Support

Set up Family Sharing on iPhone - Apple Support

How to Setup Apple Family Sharing & Create a Child Account

If Ask to Buy isn't working – Apple Support (UK)

Sign in with your Apple ID - Apple Support