What are ‘mini-brains’, and how are they being used to study neurological development and disease? Dr. Oliver Wüseke, who works with cerebral organoids as a PostDoc in the Knoblich Lab at IMBA Vienna, gives an overview of the cerebral organoid field and discusses different techniques and results emerging as researchers increasingly adopt cerebral organoid technology to study brain development and disease. This Innovation Showcase was recorded at ISSCR 2017 in Boston.