This WordPress plugin allows you to create sections of text in your post or page which expand/collapse when clicked on. You simply wrap the special tags around your text, and set the ‘expand link’ (the link visitors click on to show the text). If your visitors do not have javascript enabled, the ‘expand link’ is not shown, and the text is displayed normally.

Get it, click here

Demo:

Here is your text! Expanded and in a nice blue box, the box can be customized through CSS.