This is a mash-up of Nophead's heart shaped box, and TBuser's OpenSCAD bitmap font.

This OpenSCAD file allows you to cut, or extruded, a small message on the lid and/or the box. It requires the STLs from Nophead's Heart Shaped Box ( http://www.thingiverse.com/thing:61 ), and TBuser's OpenSCAD bitmap font ( http://www.thingiverse.com/thing:2054 ). I also scaled up the box a bit to support two lines x 4 characters.

Of course, some pieces of the 'cut' letters won't come out (like the center of the 'o'), but the message should still get across...

Make sure the heart box STL's, bitmap.scad, and the MessageHeartBox.scad files are all in the same folder. Then you can modify the messages that appear on the lid, or in the box. They can be set to extrude the letters, or cut them out.

The default OpenSCAD file is set to output both the lid and the box on a single plate for easy printing. You can comment out one or the other if you need.

I will upload a few more pre-made STL's of various 'candy heart' messages later today.