20170318 - Fort on Courts (hrb)

John Niziolek II, from Crystal Lake, helps his son John III with his cardboard suit of armor after finishing their fort during the First Annual Forts on the Courts Epic Fort Building Battle at The Racket Club on Saturday, March 18, 2017 in Algonquin. John Konstantaras photo for the Northwest Herald

Jim Kassner, from Lakewood, works on his teams fort during the First Annual Forts on the Courts Epic Fort Building Battle at The Racket Club on Saturday, March 18, 2017 in Algonquin. John Konstantaras photo for the Northwest Herald

Casey Watson, from Crystal Lake, watches as his son Aidan, 9, makes a repair to the draw bridge on Watson Manor during the First Annual Forts on the Courts Epic Fort Building Battle at The Racket Club on Saturday, March 18, 2017 in Algonquin. John Konstantaras photo for the Northwest Herald

About fifteen teams constructed cardboard forts during the First Annual Forts on the Courts Epic Fort Building Battle at The Racket Club on Saturday, March 18, 2017 in Algonquin. John Konstantaras photo for the Northwest Herald

(L-R) Seth Pollin, Hayden Sanders, and Samuel Viner, all 13-years-old use duct tape to assemble their fort during the First Annual Forts on the Courts Epic Fort Building Battle at The Racket Club on Saturday, March 18, 2017 in Algonquin. John Konstantaras photo for the Northwest Herald

Jack Kassner, 7 from Lakewood, plays in one of the forts during the First Annual Forts on the Courts Epic Fort Building Battle at The Racket Club on Saturday, March 18, 2017 in Algonquin. John Konstantaras photo for the Northwest Herald