Table Formatter is a free Google Docs Add-on that lets you add a little color to your tables in Google Docs. With the Add-on installed simply choose a color scheme from the menu and choose the size of your table. You can mix and math color schemes within the same document.
Applications for Education
The table tool is one of the Google Docs tools that tends to get overlooked. It's a useful tool for quickly creating charts. I have long used it to give organization to group notes during jigsaw reading activities.