I love the idea of this, as sometimes the harshest critics are the ones closest to you. Probably best to not give her some of the ‘adult toys’ that were being discussed though…
A few of my own to add to the list:
Live with a design every day - rather than just try it out, try to live with something you have designed using it every day. It makes you consider the lifecycle of a product in much more depth.
Work promoting a design you’ve worked on - trying to sell a design based on ‘marketing reasons’ rather than your own philosophy behind the design
Build a house - because you can