Emerging professionals: build the Ultimate Megafort in the Great Hall! Learn about basic fort structures from Museum staff, then put your skills to the test. Join others to design and construct a cardboard fort, then test its strength in a foam ball battle. Registration includes construction materials, snacks, and two drink tickets per person.

Pre-registration required. Ages 21+.

Follow along on Twitter and Instagram with #UltimateMegafort during the event.

SOLD OUT. To get updates about future fort-building and other Keystone Society events, click here.