"Youth theatre" refers to a type of theater that is specifically designed for young people. It involves young actors, usually between the ages of 3 and 21, who perform plays and shows targeted towards other young audiences. Full definition
The husband and wife team have been writing for youth theatre productions for many years. (family-bookshelf.org)
My son is involved in our local youth theatre and is the youngest one. (positive-parents.org)
Amid criticism that the profession is increasingly dominated by people who were educated at public school, he called for greater support for drama in the state school system and for youth theatre. (suttontrust.com)