Origami Quilt

Studio Gorm, a German design firm, developed the Construction Quilt. It:

[...]was designed as simple multifunctional interior piece that can be transformed into a toy by children. It works as a carpet, a couch cover and can be converted into a landscape for toy cars or fort to play in. it works off of a simple grid of triangles made of dense foam covered with wool felt.

http://www.studiogorm.com/construction_quilt.html via NotCot