Children's singing lessons in Colorado?

I want to find singing lesson for a 13 year old. Preferably around the Castle Rock or Parker areas (because they're closer to me) and not far away like in Denver. Please if you any good place that teaches voice, let me know. I've taken lessons before where the teacher just had me sing row row row your boat for 45 minutes while she talked on the phone, until my mom got me, so please someone who will actually teach me. Thank you!