The House of MinaLima in London: discover Harry Potter’s world’s designs

I have tickets to Harry Potter and the Cursed Child. Only, they’re pretty useless until we reach November 29th… next year. Only then will the precious tickets take me to the most wanted play of our times (OK, may be exaggerating just a bit). So in the meantime, what one can do is of course go see Fantastic Beasts and Where to Find Them or pop in the House of MinaLima in London.