This one is obviously on a much larger scale and had a strict colour palette to match her room - blue and purple.
I drew a paper pattern the size of the cushion (35x35cm) and added a triangular roof shape on the top side. Then I added a 1cm seam allowance all the way around. I cut the house shape out using plain white cotton. Fill it using the original cushion pad and toy stuffing to fill the roof space.
Then just carry on with the outer design.
It turned out well and she seemed delighted!