Check out my blog post on my top 5 laser-cut designs for Christmas. None of them are my designs, but they are all available for free on Thingiverse. Northern Geometry Blog :
Laser cut, shape-conforming spiral bowls by gorgonaut - Thingiverse
Thing files for Lasercut Cube by jjb - Thingiverse
laser cut cardboard" 3D Models to Print - yeggi
Laser Cut Building - Collections - siponer - Thingiverse