After many years of inventing things- things which never quite made it like a solar powered torch and a smoke alarm with a snooze button- these guys think they may be about to hit the big time with their latest invention. They're about to go on Dragon's Den, and would like to practise their pitch on you. Watch as these two madcap inventors try to convince their volunteers to back their creations. Ideal for street festivals, science theme events, town centres and shopping centres.