This week, a former milkman pitches his balance bike business accompanied by his three-year-old daughter, will a little person in the Den help persuade the Dragons to invest? Three London-based friends present their hands-free pint-pulling product, and a grandmother from the Isle of Wight, demonstrates a modern take on the ancient Greek practice of swinging... There's also a potential solution to help aid a common problem experienced by babies...nasal mucus extraction.