Hah, that sounds like a fun game. My niece and nephew are being brought up with very strict traditional cisgender-role reinforcement, and it makes me want to scream, particularly when their father says things to them like "No, what have we talked about? Short hair is for boys, long hair is for girls."

PS - It's pieces of lego. Sometimes at work I hear parents say "pokemons" and I want to strangle them.