Participation Groups of young people, in principle aged between 15 and 25 and legally resident in a Program country or third country (see sections B.2 and B.3), can participate in a youth exchange. All exchanges must involve at least one EU Member State. Each youth exchange has a host group and one or more sending groups. The first step is to form a group to discuss the project idea and agree on how to go about it.  The second step is to identify one or more partners for the future exchange. National Agencies can offer assistance in partner finding.