Over the course of two weeks, the museum’s smallest visitors were given thousands upon thousands of colored dot stickers and were invited to collaborate in the transformation of the space, turning the house into a vibrantly mottled explosion of color.

Ecce homo (Behold the man), a 1930 fresco depicting Jesus wearing a crown of thorns, became a global phenomenon four years ago when it was discovered that one of the church’s parishioners, the octogenarian Cecilia Giménez, had attempted to repair the aging artwork by touching up the paint. The result of her work, the BBC correspondent Christian Fraser reported, was that the painting now resembled not the son of God, but a “crayon sketch of a very hairy monkey.”

Popular in countries such as Great Britain, roundabouts are demonstrably more efficient at moving traffic than four-way stops and other types of intersections. Yet in many places, including the United States, they have failed to become widely adopted.