Reclined Laptop Wedge

Necessity really is the mother of invention.  I have a problematic neck and back, so working on a computer without an ergonomic desk and chair is a challenge.  Today I'm at my Mum's place and my choices are the bed, the coffee table or the dining table.

A simple cardboard box and a little ingenuity helped me make a wedge in 5 minutes flat.  To think I've been trying to solve this problem for years... sheesh!