There are tons of Game of Life kits out there but what is cool about this design is that you can plug together multiple boards to create a mega-display! Power and communications is passed from board to board, so the whole thing updates at once.
If you are connecting to an older version (v1.2 or less) of the board, with a 7805, you will have to solder in a 7805 into your kit in location IC2. Otherwise the 9V DC power will fry your GoL module!
For these instructions, I will assume you are only connecting v1.3 or higher (Adafruit design) kits together. If there's a button in your kit, then it's a v1.3 or higher kit.
The modules must be connected in the correct orientation. Each module has 4 'ports' labelled North, South, East and West. To connect a module to another, make sure that East connects to West or North connects to South! Another way of saying it is, make use the large Make: logo is always the same direction.
The easiest way to connect two modules together is to first line them up next to each other.
Then turn over and solder the other side too. This is a permanent connection, so make sure to use lots of solder on both sides to get a nice strong connection.
You can also do it without wires, just put a blob of solder on both sides.
Another way to connect them is to use right-angle header to allow plug-and-play of the modules. One module has a female (receptacle) connector. The other has a male (plug) connector. Check the parts page for links on where to buy right angle header.
If you have 5 or 6 GoL boards, you can make a funky cube. First, assemble 5 or 6 boards.
When you're done you can attach the battery pack pack and stick it onto the inside.