Stuff to Make out of the Cardboard Boxes you have left over from Christmas

Most of us have large boxes that Christmas presents came in just lying around that could be put to good use. My daughter received a Step2 play kitchen (more on that later-definitely the hit of Christmas) that left us with a large box. Much too big to just get rid of! I'm either going to make a playhouse, puppet theater, or play washing machine/dryer out of it. In searching for ideas I came across a few sites that I thought I'd share. When I start the project, I'll be sure to take pictures...


Castle:
http://family.go.com/entertainment/craft-ff-25816-the-great-cardboard-castle-t/#
http://www.enchantedlearning.com/crafts/Boxcastle.shtml
http://www.4ormore.co.uk/crafts3.htm
http://www.stormthecastle.com/paper-castle/make-a-cardboard-castle.htm


Playhouse:
http://www.make-baby-stuff.com/cardboard-playhouse-plans.html
http://www.lhj.com/relationships/family/crafts/make-a-cardboard-playhouse/

Puppet Theater:
http://www.diynetwork.com/diy/cr_toys_games/article/0,,DIY_13781_2270857,00.html
http://www.activitytv.com/37-make-your-own-puppet-theater

Rocket Ship
http://www.instructables.com/id/How_to_build_a_cardboard_Rocket_ship/

I've been searching for washing machine/dryer made out of a cardboard box but haven't been able to find any free plans online. If anyone knows of a source, I'd appreciate it. I'd love to see your pics and posts about your own cardboard creations.

BTW, can you believe Land of Nod is selling a cardboard box playhouse for $89? I like the stuff in Land of Nod...but thing this is ridiculous. I read about this here http://www.cafemom.com/dailybuzz/home_garden/1385/How_Land_of_Nod_Inspired_a_DIY_Cardboard_Playhouse