Are you sure you're not my next door neighbour? She build a beach hut (not using a kit) in her back garden, furnished it with benches, cushions and bunting, then went even further and added a wood burner for the winter.
For those DC who thought it went badly, add 20% as they can't remember what they really did. For those DC who thought it went well, deduct 20% because they are equally clueless. None of them know how their answers will be interpreted, so their own assessments are a degree biased.