Some things are worth posting about, when I find the time:
Romance
These castles by Ann Wood and Kathleen Thomasare sweet as candy. Cute as a Disney Movie. I like them, they show the craftsmanship and fun that a good cardboard project needs… Both castles are made as a window display.
Cardboard wedding backdrop
The picture are rather corny but the details on this weddingcastle are phenomenal! Wonder if the couple could take the castle home with them afterwards 
Cardboard LOGS
Why would you want to a log out of cardboard? Welll: Log log log everyone loves a log
Junior Fritz Jaquet
Jözef Sumichrast “The medium for ”Wall Rabbit” is industrial cardboard. The use of cardboard is a backlash against technology. However, I have found that when this lowly material is sanded, it is elevated to velvet.”
Cardboard Cowboy Movie: http://www.cowboycardboard.nl/
Beautifull portraits in archival cardboard by scott-fife
Cardboard LETTERBOXES
create your own font with these cardboard letterboxes
thedesignoffice.org/letterboxes/
Weburbanist made a very nice round up of some cardboard artists
The Cardboard Institute of Technology
Cardboard Record Player made of sleeve
Anne Umland (MOMA) in the book “Picasso Guitars”
“Sometime between October and December 1912, Pablo Picasso made a guitar, cobbled together from cardboard, paper, string and wire, materials he cut, folded threaded and glued, Picasso’s purely visual instrument resembled no structure ever seen before.”
via tokyobling:
and this cardboard city I also found via Tokyo Bling
Cardboard Bike
http://www.geekologie.com/2008/06/cardboard_bicycles_could_be_co.php
Cardboard Fanatics making foldable structures and displays
http://cartonlab.com/
http://www.westernexhibitions.com/current/2011/1a_Heads_Poles/2_pages/6.html
Some more from: http://www.reanimation.nl/studio
I make cardboard art that is quite unique and would like to share it with you.
http://myklwells.com/19/08/2012/snowdrop/
Also I just won an international cardboard art competition in italy which you should check out too.
http://cartasia.it
Hi Mykl! Great work! Good show! Thanks for the link to http://www.cartasia.it , we didn’t hear about it before. Good to know there’s more people working on the good cardboard cause!
Love the site and would love even more seeing my art on there. Please take a look. Thanks!
Hi Mark!
Of course! I already know your work!
What work would you like to be featured on this site? Our main focus is community and participatory art!
Keep up the good work!
check out my friend Julian’s site very worth it he is a cardboard genius.. and offers camps in cardboard aventures… seen here… https://www.facebook.com/AdventuresInCardboard?ref=ts&fref=ts
hope you get a chance to check it out .. also check out the art sled rally.. more amaing cardboard and puppet wonderfulness…
Wow Soozin! That sled race looks fun! We are at this moment trying to convince some festivalpeople to hire us for a cardboard boat race in swimming pool
Hope it will be as much fun as the sledrally!
Hi, love the site, I am mainly a painter but also I am also a cardboard artist from time to time -- check out my website for a couple of examples
Regards
Andy
Hi Andy! I love the cardboard horse
it’s cute
Thanks mathijs
its actually a donkey
I called it Jenny Hee- hore and it has its on FB page 
haha
sorry about that, of course it is a donkey
Thanks for sharing …. all are being very smart, I love it all
Regards from “si Kambi” of Indonesia
Si Kambi : Friends of Family and Children