Coffee sand is so easy to make. After you've had your morning cup of joe, just dump the used grounds onto a cookie sheet lined with newspaper and let it sit out all day to dry. (It generally dries out in about 12 hours.) After you've collected several days' worth, mix it together with some corn meal. It doesn't necessarily need to be equal parts, but I like to make mine look (and smell!) more like coffee than corn meal. If you get impatient, you can always add in coffee straight from the tin, but why not get your daily pick-me-up out of it first, right?
Since L is such a fan of scooping and pouring, I equipped the coffee sand with measuring cups and bowls. It was so much fun watching L work her little sniffer to figure out what was different about this new sand! It is definitely a treat for the hands and the nose!