Hazel Ives swings into the den hoping the dragons will do some monkey business and invest in her high wire adventure park; Michael Cotton tries not to misfire with his device to prevent unlucky motorists filling up their diesel cars with petrol; and what will the dragons think of some gut-wrenching toys based on roadkill animals?The multi-millionaire investors also interrogate 26-year-old Peter Hopton about the green credentials of his eco-friendly computers; former pharmaceutical executive Ed Wray who's given up his day job to chase his entrepreneurial dream, shows off his new spin on outdoor cooking - the Barbeskew; and attempting to light up the Den is PHD Scientist Ming Yun from Oxford with his illuminating range of party products.