We have an old Ikea L-shaped modular sofa which we moved from the lounge room up to the bedrooms - a different module in every room. It was navy, which was fine as a sofa, but boring in an 11 year old's bedroom, so she chose the material and I recovered it.

Of course, we had to add some cushions on the bed with the scraps.

And then the desk chair looked sad, so I did a tied cover with polar fleece.