This article aims to show a selection of the main international human rights legal standards regarding children’s right of participation. It analyses briefly the principal legal frame both of the universal human rights protection system and of the Inter-American Human Rights System in the field of participatory rights of children. The essay ends with some reflections on the new Chilean draft law on gender identity, which has been discussed since 2013 in the Chilean Parliament. The article analyzes if the pre-existing international standards have been incorporated by the Chilean lawmaker, with the ultimate purpose of contributing to the current debate within the perspective of the International Human Rights Law. Of course, participation is just one of the numerous rights which are challenged in this debate, but the study of this particular right from the international human rights point of view ensures an alternative look on behalf of the inclusion of children within the mentioned draft law.