Grandpa Flump is playing his Flumpet loudly, this puts Perkin in a bad mood. Ma tells Perkin to cheer up otherwise he will be 'under a Grey cloud all day'. It's true as a cloud follows Perkin everywhere - how to get rid of it?

Pa Flump is making some roller skates for Perkin and Posie. But they are so useful for moving heavy things with, soon everyone wants to borrow them. Eventually Perkin and Posie get a pair each - but need to learn how to skate.