NEED HELP WITH CSS HOVER TO APPEAR WHEN ROLLED OVER AND CHANGE CONTENT

Here is the table I am working on..
http://www.mindfulscience.com/suscription-table/

Im close.. I just cant connect the final touch to get this to behave like the one located here, really needing this functionality before I can add content to this table
https://www.headspace.com/buy

thanks for your time on this