Sandbox is potential tool available for Word Press theme webdesigners and developers. The Sandbox can be easily designed with CSS. Experienced developers and designers can achieve good results with minimal work using Sandbox. Due to the rich, semantic markup and profusion of classes dynamically generated by the Sandbox, quite complex designs could be developed.
The Sandbox is a theme for Word Press, but it has salient feature like
Compatible with Word Press 2.6.x+ (and 2.0.x)
Compatibility with widgets
The basis for your own GNU GPL-licensed theme
Valid XHTML 1.0 (Transitional)
You will be able to customize it with CSS Alone and one need not have any botheration about other files, functions, files, themes. One can learn a lot about CSS, XHTML, php class generating functions are included with sandbox create an extensible and semantic XHTML structure. You can mark up with a selector. The Sandbox was the first Word Press theme to include full support for the hAtom and hCard micro formats. Micro formats are machine-accessible, human-readable structures for XHTML. Micro formats theme came from developers of word press as an experiment and it evolved into advanced, richly semantic theme. Innovative class-generating functions were later added.
Sandbox is a skeleton theme for WordPress. Though you can use it by itself, it is meant for designing up with a Custom CSS Stylesheet upgrade. Sandbox provides all the HTML markup, with a rich semantic structure, and all sorts of microformats and standards built in. Developers or designers can develop the stylesheet, which controls the appearance: layout, colors, fonts.