If you have a Raspberry Pi computer board, you can make a great case for it out of an Altoids mint tin.
You’ll need:
1 Raspberry Pi computer board
1 Altoids mint tin
1 Plastic gift card
1 Dremel or Small drill
1 Tin snips or diagonal cutter
This work is in the Public Domain. To view a copy of the public domain certification, visit http://creativecommons.org/licenses/publicdomain/ or send a letter to Creative Commons, 444 Castro Street, Suite 900, Mountain View, California, 94041, USA.
Step 1: 1) Left side of tin
Step 1: Drill a hole for the Pi LED corner at the bottom front left corner of tin; then, with tinsnips or diagonal cutter, cut out large area (as indicated in picture) for the Ethernet & USB ports in the left side of the tin.
Step 2: 2) Front side of tin
Step 2: Drill holes in the front side of tin for the audio and RCA jacks. The RCA jack hole will include part of the tin lid lip.
Step 3: 3) Right side of tin
Step 3: Drill holes for the SD card and power jack in the right side of the tin.
Step 4: 4) Back (hinge) side of tin
Step 4: Drill a hole for the HDMI port on the back (hinge) side of the tin.
Step 5: 5) Insulate the bottom
Step 5: Drop a plastic gift card into the tin to insulate the bottom of the board from the bottom of the tin.
Step 6: 6) Begin to install the board
Step 6: Angle the board into the tin so the RCA jack goes through its hole first.
Step 7: 7) Complete the board insertion
Step 7: Drop the HDMI side of the Pi board down into the Altoids tin.
Step 8: 8) Install SD card & peripheral connections
Step 8: Plug in your SD card, video (RCA or HDMI), audio, Ethernet and USB (keyboard & mouse) plugs.
For more detail: How to Make a Raspberry Pi Case From an Altoids Tin