Lexus commissioned a fully functional electric car built from laser cut cardboard. It comprises 1700 individual pieces and took 3 months, I imagine the builders were quite card-bored by the end of assembly.
Another post from the laser cutting group now, Jocelyn has shared these Christmas letters and is currently working to complete the set. I hadn't realised how early people start working towards Christmas craft faires until I started reading these groups but I guess it makes sense. I'll keep you posted as to when the rest of the set it released assuming they letter do it amidst all the requests.
Full Spectrum Laser are offering up these interesting maze designs through the instructables website . The mazes are constructed of 3 layers with the walls sandwiched between the two outer layers, very small ball bearings are inserted into the layers to make the maze game. Being an instructable they provide pictures and files so you won't get lost while trying to recreate it.
Instructables user JackCarter made this awesome lasercut tank model from MDF. The functional tracks looks great and the laser is perfect for making a repetitive object like that, although they do also provide the files to make a static track if you don't have enough patience for assembly. There are lots of tank models out there but, because this comes with instructions, it is definitely a challenger for the best.