‘Peppy’ is a product that incentivises children with Cystic Fibrosis (CF) to practise airway clearance therapy, through the use of playful attachments. Peppy also functions as a spirometer, meaning, it records the user’s lung function levels and logs it on the Peppy app, where it can be accessed by the user and shared with their medical team. People with CF must stick to a daily routine of clearing their lungs of mucus in order to stay healthy. This experience can be far from pleasant, particularly for children who can struggle to understand why they must devote time away from their day to do this. Positive expiratory pressure (PEP) therapy is an airway clearance technique for CF patients. By breathing out with a moderate force against a resistance, a positive pressure is generated in the airways, helping to keep them open. The routine can become rather monotonous, so Peppy makes it exciting and enjoyable through the use of fun attachments that the user can play with using their breath.