Cacti do not get as much credit as they should. For many people they are usually associated with desert or just a sort of plants. However the range of forms, colours and textures in the around 16000 species is much broader than one may think. The geometrically interesting arrangment parts and the subtleness of the tiny details can be extremely impressive. In addition to their aesthtic pleasing look cacti develop in an very interesting manner. They go through six stages where they change their texture and grow spines. Only after this prosses they can be called adult cacti.