Children's history education series. Sid the Saxon and Vik the Viking board the Time Travel Express for a trip to the 21st century. Their mission? To let people know what life was like more than 1,000 years ago. Vik and Sid arrive in Ireland, where many Vikings settled after sailing the seas on their incredible longboats. Vik explains why Ireland was important to Vikings, and how Dublin became the centre of a vast trading empire.