What is skin? -- What does skin do? -- What is inside skin? -- How does skin feel touch? -- Why do we wash our skin? -- What are freckles and moles? -- What does sun do to skin? -- What hurts my skin? -- How does skin heal itself? -- What are spots and sores? -- How long do hair and nails grow? -- How can I take care of my skin? -- Skin, hair, and nail facts.