The National Building Museum has moved on from The Beach, but its materials will live on underneath Dupont Circle in the form of another whimsical, interactive exhibit.

The Arts Coalition for the Dupont Underground has announced the New York-based firm Hou de Sousa as the winner of Re-Ball!, a competition for an artwork designed specifically for the new venue. The design studio, made up of Jia Min Nancy Hou and Josh de Sousa, came up with a concept that is part Lego, part Minecraft. They’ve dubbed it Raise/Raze.

“We proposed a re-usable system, rather than a specific form or design, resulting in a dynamic and direct relationship between creation and destruction,” the team said in a release.

To that end, the pair experimented with gluing together the balls, which once floated freely in a mock “ocean” underneath the skies of the National Building Museum’s Great Hall, into modular pieces. They expect it will take about 3,086 hours to assemble more than 18,000 3x3x3 cubes out of half a million plastic balls.

The cubes will then become the sturdy building blocks for five different zones (text, cave, grove, shell valley, and government buildings) in the curved space. As they explain in the project brief:

When accessing Dupont Underground from the main entrance at New Hampshire Ave, visitors are surrounded by the most compressed zone, a crystalline cave, which forks into two windy paths. The Southward path leads to a forest-like colonnade of twisted trunks and stumps for resting on. Beyond this grove lies a series of large spherical shells that define a meandering path while simultaneously enclosing small pockets of space. As one passes through this valley of domes, a group of scaled down buildings begins to appear; the White House, the Capitol Building, and the Supreme Court Building. Conversely, if at the cave’s foyer one forks towards the North, then the visitor encounters and passes through a space of massive letters and walls of text.

But although the zones will be intentionally designed at the outset, visitors can take apart the cubes, which will be attached with velcro, and reconfigure things at their whimsy.

“We were impressed with how their design translated a material concept into a social concept,” Craig Cook, an architect and the director of Re-Ball!, said in a statement. “Visitors will activate the installation and implicitly engage in a democratic process: some build, some destroy, some work together, some work alone. It is a piece that is especially relevant to Washington.”

The installation will run from April 30 and run through June 1. But it will be accessible by reservation only; those who contribute to the group’s crowdfunding campaign at the $25 level will be guaranteed a spot.