Bob and the team are building a special flat-packed eco-home for Marjorie. Muck and Benny go off exploring with Spud. The trio find a river bank full of mud and Muck decides to build a mud hut. They are soon having a huge mud fight! Muck picks up so much mud that the riverbank bursts, flooding Marjorie's tent. This teaches Muck an important lesson. Show less