My son is 4 years old and is an extremely active kid! He wanted to take Taekwondo so badly and we called around and were fortunate enough to get ahold of Mr K (or Sir, as my son calls him). We came in for our 2 week trial and Ryan loved it! Sir is such a patient person and is phenomenal with kids! When he has a room full of 4 year old boys it makes my eye twitch but he handles it with no problem! Not only does Ryan learn martial arts moves, but self defense, and the history of Taekwondo as well!