Mud lake Greenwings

The Mud lake Chapter recently held a Greenwing event. The following are pictures of the greenwings building woodduck boxes

        I need complete concentration!                                        How do they do this?
        We've got the first piece.                                                    Tab A into slot B
        Team Effort                                                                        I'll help
         Lets get the right angle on that screw                            Looks like a busy shop
                     I didn't do it                                                                    Almost done
                                     Boy in a box