This month's visiting teaching gift (and message) is all about being helpful. It's about caring and letting the person you visit know that if something comes up, you'll be there. The August visiting teaching message is here at lds.org.
The instructions are on the printable, but basically, you print it, cut it, fold the circles in half and glue (leave the top open), write your name and phone number under the heart, and slip the heart inside the circles you just folded. A magnet on the back is nice but not neccessary. Very easy.
This is also good for mailing. It fits perfecty in an invitation-sized envelope (that's the size that holds an 8.5x11 sheet folded in quarters). If you don't have that size on hand, I have a template here.
In addition to visiting teaching, this would also be cute as a little card for any occasion -- use the writing space to show your love :)