Amazing Resizing Table.

Walking Table

Strange Storage Box/Table

Flexible Love Seat

Mighty Morphing Power Chair

Also check out:
http://foldschool.com/ for some wacky cardboard furniture and how to tips.
10 Pieces of Clever Transforming Furniture: From Tetris tables to Rooms in a Box - Web Urbanist Article

This post is tagged cardboard, Design, furniture, table, video, youtube