This order, less known than others such as, for instance, those of the coleopterans or of the lepidopterans, has always had the merit of getting close children, amateurs and/or simple onlookers of the fascinating world of the entomology. This thanks to the fact that all leaf or stick insects are herbivorous species, in particular phytophagous, that is nourishing of leaves; animals harmless to humans and easy to breed, seen that almost all do have vestigial wings and consequently cannot fly away. They give great satisfactions, especially to the children, because they can keep them in the hand, and extremely prolific seen that they reproduce by parthenogenesis.