Awareness of the outside world. Hordes of strangers packed into large convention spaces will be one of the last activities to return.
In a normal year, this would be BrickFair weekend.
Check out a more complex fan version, also known as an AFOL MOC, at Brother’s Brick: The dark art of LEGO building.
Plot question. Shouldn’t Harry have seen thestrals his first year?
Stay safe. Stay sane.