A cool video has emerged of father and science teacher Jacob Strickling putting up a home-made 'dunking-chairs'.<br /><br />In the video, shot near Sydney, Australia on Sunday, Jacob throws balls at targets which causes a nail to burst balloons held above his children's head. <br /><br />"The story behind the carnival activity has been years in the making. Jacob has been the 'Carnival Master' at his local church every year for the past 7 years," he wrote. <br /><br />"The kids love the activities he has built eg dunking chairs, skill testers, ring toss etc".
