Adult fans of Lego, known as AFOL

This weekend, hundreds of Lego building enthusiasts are gathering for a celebration of Lego as an artistic medium at Bricks by the Bay.

Adult fans of Lego, known as AFOL, in Northern California are gathering for the second year at Bricks by the Bay, where they exchange ideas, challenge each other to building contests, and build with one of the most creative toys ever made.

The event is open to the public this Sunday, March 27, at the Hyatt Regency Santa Clara at 5101 Great America Parkway in Santa Clara, Calif.