Navius operates by reading binary code from black and white discs. A disc is inserted into Navius and an infrared sensor reads it as it spins. Students make their own discs by filling in blank ones with a black marker.  A disc template is included in the kit which can be photocopied.  Includes electronic PC board and infra-red sensor.  Some assembly required.

Runs on 2 x AA and 1 x 9V batteries (not included).