Step 1 - Find yourself a pet rock that will be receiving the Wifi Linux heart. You may have a little difficulty if you choose a small rounded pebble as your target. A garden LED spotlight type of rock may be more suitable here. Something that has space inside it.

Step 2 - Pretend you're a rock doctor, and remove it's insides! Try not to break the rock, as it won't be waterproof any more. Unless you've chosen a massive rock, the existing solar panel can be left on for aesthetic reasons. It's way too small to power this rock.

Step 3 - Assemble the charging board

Step 4 - Compile the VoCore Firmware, and upload to the VoCore module while plugged in via USB

Step 5 - Connect the VoCore to the Charging board and battery

Step 6 - Connect the VoCore to your Wifi, then add components as required. Connect a temperature sensor. Make your rock Tweet you when it gets too hot!