As a product designer, I want to understand the core principles of designing for children's rights. Navigate to the 'Principles' section of the Designing for Children's Rights Guide website. Find the principle category 'The Child as a Human Being' and identify its first listed sub-principle. What is this sub-principle?
Navigate to 'https://childrensdesignguide.org/'. Click on the 'Principles' link in the navigation menu. Locate the main category 'The Child as a Human Being' on the 'Principles' page. Identify and extract the first sub-principle listed under 'The Child as a Human Being'.
The agent successfully navigates to the 'Principles' page. The agent correctly identifies the first sub-principle under 'The Child as a Human Being' as 'Principle 1: Put the best interests of the child first'.