The Wooden Plank

The boys find a wooden plank buried in the sand on a beach. What could it be? As usual, their guesses and drawings are way off the mark, so they decide to take the plank off to Suzy and Archie at the Museum of Cornish Treasures. From there, they discover the history of Cornish surfing, how boards are made and how surf rescuers keep people safe in the water.