Cardboard Parking Garage

Kinderpendent has a great tutorial on how to create a multi-layered cardboard garage.

Good for ages 10 and up.

Get the instructions here:
http://kinderpendent.blogspot.ca/2011/04/cardboard-parking-deck-tutorial.html

B inspired mama has a simpler garage, but numbers each spot and the matching car for number recognition practice.

Get the instructions here:
http://b-inspiredmama.com/2013/08/numbers-game-car-parking/

Lilla a design maker her version from a shoe box that opens up to have more parking spaces on the top.

Get the instructions here:
http://lilla-a-design.blogspot.com.au/2010/01/skolads-hus.html

Handmade charlotte uses an empty pizza box and toilet paper tubes to make a two story garage. 

Get the instructions here:
http://www.handmadecharlotte.com/recycled-pizza-box-car-garage/

Cardboard Play Castle

Mer mag shares a great template for making a cardboard play castle using interlocking pieces so it stands up on its own.  She suggests using duct tape to decorate the castle.

Good for ages 7 and up.

Get the instructions here:
http://mermag.blogspot.com/2012/05/interlocking-cardboard-castle-diy.html

Little lady bird uses popsicle sticks and ribbed cardboard for her version.

Get the instructions here:
http://blog.littleladybird.com.au/2012/10/how-to-make-castle-out-of-nappy-box.html

Twitchetts makes a pretty pink one.

Get the instructions here:
http://twitchetts.com/2015/07/cardboard-play-castle-tutorial.html/

Cardboard Play Houses

A beautiful mess turns large cardboard boxes into playhouses for the kids.  The big difference is the wrapping paper and paint she uses to decorate the homes.  She even adds shingles for the roofs.

Good for ages 10 and up.

Get the instructions here:
http://www.abeautifulmess.com/2013/01/diy-playhouses.html

Kids activity blog uses pieces of cardboard and ties them together.

Get the instructions here:
http://kidsactivitiesblog.com/64384/cardboard-playhouse

Tiny rotten peanuts makes mini cardboard houses painted in the primary colors.

Get the instructions here:
http://tinyrottenpeanuts.com/mini-houses-recycled-cardboard-art-project-for-kids/

Cardboard Box Doll House

Pinterest hosts a template for making a doll house out of a cardboard box.  (The original site no longer hosts the template).

Good for ages 9 and up.

Get the instructions here:
http://pinterest.com/pin/239113061438609263/

Mother baby earth creates cardboard calendar houses based on the Anthropologie versions. 

Get the instructions here:
http://motherbabyearth.com/blog/?p=825 

Mermag blog uses colorful duct tape to make their cardboard castle.

Molly moo crafts uses shoe boxes for her version and decorates with textured scrapbooking paper to make carpeting, wood floors and wall paper.

Get the instructions here:
http://mollymoocrafts.com/diy-dollhouse/

Artful parent adds light to her version.

Get the instructions here:
http://artfulparent.com/2014/02/from-cardboard-box-to-lighted-dollhouse.html 

My poppet uses a shoe box and adds cut out interior objects from magazines to decorate the room.

Get the instructions here:
http://mypoppet.com.au/2012/08/kids-craft-shoe-box-doll-house.html 

Mad in crafts uses foam board and draws on the pictures.

Get the instructions here:
http://madincrafts.com/chalk-foam-board-dollhouse/