Innovative methodologies in paediatric drug development: A conect4children (c4c) special issue On average, half of all children in Europe take medicines, either for acute or chronic illness. At the same time almost half of these prescriptions are off-label, due to a historical lack of medicines specifically developed for children. 1 For ethical, practical and economic reasons, academic and industry researchers were reluctant to study drugs in children. With the 2007 EU Paediatric Regulation, and similar initiatives across the world, this situation has changed, as companies are now mandated to submit paediatric investigation plans early in the course of drug development. While these legislative efforts have resulted in a huge increase in the initiation of paediatric trials, new paediatric registrations have severely lagged behind. 2 Several causes can be identified, but a major reason for this disappointing result has been the failure to successfully perform paediatric clinical trials, not only in Europe, but across the world. Many studies were started but did not manage to recruit sufficient numbers of patients, and other studies failed to provide adequate answers on efficacy or safety due to suboptimal study design. To overcome these challenges, the European Union with 10 pharmaceutical industry partners allocated, in 2018, €140 million for the conect4children (c4c) project through the public-private Innovative Medicines Initiative 2 (IMI2) funding programme. 3 The aim of this project is to provide better medicines for babies, children and young people through a pan-European clinical trial network. c4c aims to generate a sustainable infrastructure that optimizes the delivery of clinical trials in children through: (a) a single point of contact for all sponsors, sites and investigators; (b) efficient implementation of trials, adopting consistent approaches, aligned quality standards and coordination of sites at national and international level-to set up the network, three academic and at least four industry paediatric proof of viability trials will be run across the European network of over 20 countries and up to 300 sites; (c) collaboration with specialist and national networks; and (d) an education and training platform to shape the future leaders of paediatric drug development. The c4c Academy has been set up and is offering courses for good clinical practice, family and patient involvement, monitoring, trial start-up, paediatric investigation plan, innovative trial design, gene therapy trials, train the trainer, trial specific training, and paediatric drug development. Moreover, c4c