"Why didn't I think of that genius idea?" This is the remarkable, at times funny, story of a young entrepreneur who, aged 18 and with $4,000 and no other funding, started up invisibobble - the revolutionary hair ties that have taken the haircare industry by storm. Today, Sophie Trelles-Tvede's company has sold over 100 million hair ties around the world and turns over $15 million.

As a first-year university student, getting ready for a party, Sophie spotted an old telephone cord and decided to use it to tie her hair with. The next morning, she noticed something different with her hair: she did not have a headache after untying the cord and there was not much of a mark (or kink) in her hair. The genius idea of invisibobble was born right there! This is the story of the idea and thereafter - the ups and downs, funny and serious moments, of an entrepreneur's journey that will inspire others and reveal what it takes to succeed.