The Water Drill

Leo and his friends are having a wonderrful time on Seashell Island: the robots are sunbathing, Leo and Lifty are playing football, and Lea's gone off to collect seashells. It's very warm weather. The group want something to drink, but the robots have drunk all the water. What should they do? Leo brings the parts he found on the ferry and says they should build a drill. Now there'll always be water on the island.