This is a design that I found an image of online then drew up in Inkscape - not my original design.

It is designed to work with 1/8" (~3mm) birch plywood. If you are using material of a different thickness you'll need to modify the slots that fit together. The complete file is 240 mm x 200 mm cut out fine on my stock K40 w/ K40 whisperer. I used masking tape on the back to cut down on burn marks.

If it's useful to anyone - my K40 is stock + new bed/alignment laser/air assist, my settings for 3 mm birch ply are:
Raster engrave: 5 mA at 200 mm/sec
Vector engrave: 3 mA at 50 mm/sec (lines a little wavy sometimes - might need to slow down)
Vector cut: 10 mA at 10 mm/sec

The blue vector engrave lines are just there to help line the pieces up - they are slightly undersized so that they do not show when assembled. You don't really need to engrave them if you don't want. If you wanted more text on the model you could use the blue lines as margins to see where the next layer will sit. The text can be changed to whatever you like and the small tree image was from some free tree font that I found online.

As is, everything should fit together fine - but it won't really stay together if you try to move it. If you want it all to stay together you will either need much tighter tolerances or a couple drops of wood glue. The top of the tree also has some very thin spots - so be careful taking it out of the frame.

Enjoy and let me know if there is any other info that would be helpful...this is my first thing.

Merry Christmas