Had a lot of acorns this year, some of good size which go me thinking, ‘Can these things be layered on the forge?’ Yes, yes they can.
Created a simple ‘2019’ label in a PDF program and then loaded that into the 'forge. The acorn I stabilized between 2 magnets to hold it in place. A jig would be good for great number of these, but I wanted to just test this. I used medium walnut for the settings to try things, and the set focus for the 'forge to calculate height at curve. After loading the PDF, was able to engrave this in 30 seconds.
Why do this? well, these could be an easy way to label the acorn crop for future planting (since you are just burning the outer shell), can make nice messages for friends and family “I(heart)U”, or maybe make year specific xmas tree ornaments. You could also show them to your crazy neighbor saying the squirrels have a message.