The puzzle consists of 5 boards and 45 cards. Each board consists of 9 shadows of pictures from a given category: fruits, vegetables, animals, sweets, and clothes.
The puzzle involves recognising the shadow and placing the appropriate coloured card on the given shadow. The activity can also be performed with the board set at a further distance, with the coloured cards being arranged up close in the same way as on the board.
The product is compatible with Bernell® red-green filters. It should be used according to the recommendations of a qualified vision therapy specialist. If used contrary to the recommendations, undesirable side effects may occur.