Step 2: Make the House
There's not much to making the house -- it's just a box. Simply cut-out the front, back, and side panels and glue them together.
Ok, it's a little more complex than that. If we had used thicker wood, it is hard to beat biscuit joining the corners, but with the thin plywood I had around, there would not have been enough material to hold the biscuits. That's where the pieces across the top come in. These provide enough material to screw into without interfering with where the birds will want to be. Thus, the assembly process was to spread glue on the edges, clamp it together, and then glue and screw the cross pieces.