Look, there are just some facts you have to acknowledge in this world. And one of them is that you're never too old to build an indoor fort.
The Ultimate Megafort building competition is returning to the National Building Museum (401 F St. NW) in March.
On Wednesday, March 2, hack together cardboard, tape and other materials provided by the museum in an effort to make the best fort and prepare for the Great Battle of the Foam Balls.
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Check out the gallery above to see some of last year's forts, castles and strongholds.
Aspiring cardboard architects must register in advance online here. Admission to the event will run you $20, unless you're a member of the Keystone Society. (In that case, the event is free!). The competition runs from 6:30 to 8 p.m.
Port City Brewers will serve drinks and Union Kitchen will be catering, as if you need a reason beyond adults-only fort building to attend.