We describe an integrated organic electronic imaging circuit, the circuit comprising a substrate onto which are integrated: at least one organic photosensor to detect an optical signal; an organic transistor circuit coupled to the organic photosensor, and configured to process information from the detected optical signal and to output a drive signal; and a display, coupled to receive said drive signal from said transistor circuit, to provide a display responsive to the processed detected optical signal. Embodiments of the invention use one or more arrays to compare colours and/or shapes, for example for a child's toy.