Via National Building Museum.

You can either look at this as the chance to go behind the scenes at two of D.C.’s most buzzed about projects, or as a wildly underpaid moving gig.

Dupont Underground is looking for volunteers to help them pack up the giant ball pit from the National Building Museum’s The Beach and ferry it to the cavernous former trolley tunnels underneath Dupont Circle.

On Monday and Tuesday, different groups will pack up the translucent balls up, trek the boxes over on the Metro, act as an underground conveyor belt, and, finally, dump them into the space. Later this year, they’ll get a second life as the raw materials for an art competition that Dupont Underground is hosting as one of its first exhibitions.

It isn’t the first time Dupont Undergound has called in some free help. Earlier this year, volunteers helped tear apart the food court that had been built in the mid 1990s and was quickly abandoned.