Amusing footage has emerged of a science teacher dad inventing a clever basketball net toy to cool his kids down during a heatwave in Sydney. <br /><br />In the video, filmed today in New South Wales, Australia, Jacob from the YouTube channel Make Science Fun can be seen constructing the machine before we see it in action. <br /><br />The children throw a ball at a tennis racket attached to an arm, and if they hit the tennis racket it activates a falling spike attached to the basketball net, which then explodes a water balloon, pouring water over whoever is sitting below it. <br /><br />Jacob is a Science Teacher and well known YouTuber, with a popular channel called Make Science Fun.