These Skulls make awesome and quick halloween decorations. It's also a great activity for family and friends!

Step 1: Upload and Tweek

We used a skull design from 123D Make. Check here for more information on the app. You can use the internet app or you can download it to your Mac or PC. Both are free!

Note: If you use the web app on your Mac, the app doesn't work through Safari.

Open the App and Browse Community. You'll see a search box. Type in skull. There'll be a couple different kinds of skulls, but for this Instructable, we'll be using the one on the right with a tag of "scary skull" (see picture).

Open that version. Choose stacked slices for the construction technique. Then, change the slice direction if needed. We made it so the cuts were more diagonal rather than horizontal. Change the manufacturing settings to the size of your laser printer. Finally, change the size of the object. This is completely up to you.

Once you've tweaked the original design, click get plans. Export using PDF.

Note: Even if you don't have access to a laser printer, you can do it by hand. All you'd have to do is print out the images on a normal printer, cut out the stencil, pin it to cardboard, cut, and glue.

Note: Autodesk 123D is partnered with various 3D printing services. Check out this link for more information!

Step 2: Laser Cut

Send your information to the laser printer. Open the PDF doc, click file, print, then choose the your laser printer. This will create a "job" in the printer.

Put your piece of cardboard in the laser printer. Make sure it's down flat! Close the top and press "enter" when you're ready. Let it run. Ours took about 15 minutes. When it's done, open the top and take the pieces out.

Some pieces may not fall out like in the picture. You'll need to pop them out.

Step 3: Organize Pieces

All of the pieces are numbered, so organize them. We found putting them in order helped a lot.

Step 4: Start Glueing

Use white or gel glue to glue to pieces together. Follow the order. Also, the dots align. Each piece alternates whether they match horizontally or vertically. It doesn't need to be perfect, do you best.

When you're done glueing, you'll have a 3D skull sitting in front of you. We putt the gel glue in the eye sockets to give it a glazed look.