The main purpose of the Web Design Playground is to provide you with an easy-to-use tool to play around with HTML tags and CSS properties. Here’s how it works:

1. Use the HTML Editor to type the HTML tags and page text you want to try out. If a tag requires one or more attributes, be sure to add those as well.
2. Use the CSS Editor to type the CSS property definitions you want to use.
3. Examine the Results pane, which displays what your HTML and CSS will look like in a web browser.
4. Repeat steps 1 to 3 to fix any problems or perform further experiments.