Soft bricks you make sofas out of

Sofa-bricks are washable, adhesive-backed soft "bricks" you can use to turn walls and floors into semi-permanent lounging areas (for example, you can stack them around the head of your bed to give you something to sit up against when you're working).

The simple mould of SOFA BRICK enables manufacture from various materials. For example, cork grains will offer a soft, comfortable brick.

Link (via Cribcandy)