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.
LesMarco kindly shared this file for a sugar skull pen holder through the thingiverse website. It's a good example of slicing a shape and decorating it appropriately. Being cut from Poplar plywood the details could be coloured in nicely with some fine tips pens to add a real flourish of colour. A handy pot lot this is a good way to despens stationary as required.
Diego from engravers dungeon has developed an incredible technique for laser cutting that really makes their designs stand out. The colours are painted on before engraving but the secret sauce lies in the two tone style of engraving, something that they are understandably keen not to share. The whole thing is finished off with a mixture of wax and varnish to make a nice piece that I would be happy to own. I make no bones about it, this is some high class engraving even if I am trying to be humerus.
There are a couple of giant hand builds around but I like this one from instructables user musicandsky because they've gone for a purely Halloween theme scare style. When combined with the skull mask, I imagine they had a lot of fun out and about in the evening. You'd have to pick your party carefully though, they should be good with finger food but undoubtedly clawful with drinks.