The base is a metal ball. The triangular and quadrangular segments are attached to it with a magnet in their narrow part. Plastic covers of different shapes are attached on top, they are the same for triangular segments. But for quadrangular segments – there are 3 different types of lids. So you can give the models different shapes by turning or rearranging the parts. To make the constructed object more recognizable, the sets may have fins, tails and horns/ears.
