This is not exactly a tutorial, but is a really nice video and a (exhaustive)love proof of a father to your little daughter.
Link to original video: Building.A.Cardboard.Playhouse.Timelapse.by.Wikiphotos.via.Youtube
More Cardboard Projects related posts:
The Great Cardboard Castle Project - by Spoonful - O Grande Projeto Do Castelo De Papelão
Minecraft Desktop Organizer Cardboard Project - by Te Digo Cómo Se Hace
Cardboard Box Moose Head Wall Hanging Tutorial With Templates - by N36 - via Instructables
Narnia Boat Cardboard Project With Templates For Kids - by Ikat Bag