Not cardboard yet. Brent Comber - alder cubes. Tubes topped with something clear with light coming up?
DIY Hanging Mason Jar Lamp- (picture tutorial)
Handmade vases made from tree stumps Handmade - Home & Kitchen - Furniture - handmade furniture - http://amzn.to/2ksLfE7
Tutorial: How To Make A Circular Mirror With Wood Slices http://theownerbuildernetwork.co/bn73 Mirror, mirror on the wall... looking for a weekend DIY project? Then this mirror could be just what you're looking for.