Put up an intro video explaining the what and how of FlexGrid CSS. It’s a short intro, but FlexGrid CSS is very easy to understand and use. And most, importantly FlexGrid is very light at 4kb.
Flex Grid is a percentage based CSS Grid Framework. It’s light, easy to use, and built for WordPress.
To Download FlexGrid CSS: http://simonwebdesign.com/downloads/flexgrid-css/