Invention of magnetic resonance imagining is one of the largest accomplishments of modern science and medicine. Numerous scientist and physicist worked together in order to create MRI technology available to everyone and take clinical medicine to a new level. Nowadays, it is possible to create high spatial resolution images of every body part on all supra-conductive MRI scanners, and as of recently a method of whole body imaging has entered into clinical practice. Whole body magnetic resonance imaging in children has been gaining popularity and is used more and more for evaluating the extent and monitoring al kinds of inflammatory and neoplastic pediatric diseases. By creating WBMRI protocols and by multidisciplinary approach to treating patients, this imaging modality is being used more and more in clinical environment. New technologies are being implemented to raise efficacy and usage of this imaging modality. WBMRI provides us with high quality anatomical and functional information without the use of ionizing radiation. In this review paper a short summary will be given on historical development of MRI technology, comparisons between other methods used in pediatric radiology, most common indications for using pediatric WBMRI and protocols used in clinical practice.