Researchers got 6 people to eat Lego heads and then search for the toys in their poop

This sounds like it could spawn a new indoor team sport.
Opposing teams could each devour 5 or 6 pieces of a Lego monument, say, Winchester Cathedral or even better, the White House. Then, in a race against time, they would compete to recover and reassemble the monument.
Of course, each piece would have to bear a unique identifying number - to prevent any substitution shenanigans - 'cause we don’t want any of that kinda shit going on.