JEFFERSON — Local artist and game designer Aaron Weissblum will unveil his outdoor game, “Trail Guys,” from noon to 1 p.m. Sunday, Feb. 17, at Hidden Valley Nature Center.

Participants will use a puzzle to interpret a code placed strategically along the trails at the center. Weissblum will explain how the game is played.

That day’s activities will also include a primitive friction fire-making demonstration with Jason Chandler and James Sturtevant from 1:30 to 3 p.m.

Lunch will be for sale. For more information, visit

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