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HTML and CSS · lesson 11 of 30 · free

What CSS does — HTML and CSS for kids

CSS stands for Cascading Style Sheets. HTML builds the page, CSS decides how it looks — colours, fonts, sizes, spacing and layout — and JavaScript makes it do things. CSS can be written in a style attribute on one tag, in a style tag in the head, or best of all in a separate .css file linked from every page, so one file styles the whole website.

▶ Watch how it works

Got it? Practise ↓

Code tip

Build, style, act — “HTML builds the page, CSS styles it, JavaScript makes it do things”

  1. HTML = structure (headings, lists, links); CSS = style (colours, fonts, spacing, layout); JavaScript = actions.
  2. CSS can go in a style="…" attribute, a <style> tag in the head, or a .css file.
  3. Link a file with <link rel="stylesheet" href="style.css"> in the head.

Use it for: Starting to style your pages and choosing the right language for each job.

Worked example: 🧩 Which language puts a picture on a page? → HTML

  1. Putting things on the page is building its structure.
  2. Structure is the job of HTML (the img tag).

Check: Making the picture round would be CSS; putting it there is HTML ✓

▶ Watch it animated

✓ Written and checked by the TalentJR team · Updated 13 Oct 2026 · How we make our lessons

✏️ Practice

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🏁 Lesson 11 test

20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.

🏅 Sign in with Google to earn the 🎨 Style Sheet Starter badge when you pass — and a certificate when you finish all 10 lessons of Part 2 · CSS. You can still take the test without signing in.

🖨️ CSS Worksheet: What Is CSS

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