I've already experienced learning ballet when I was still a little kid. And I found it fun and enjoying. Based on my observations, kids, ages 4-8, really find ballet enjoyable. Besides that, kids still have those flexible body that's why they're able to cope up and learn fast. During my kindergarten years, Ballet is one of my extracurricular activities in school. If I'm not mistaken, we have these ballet lessons once or twice a week and we're going to present it during our monthly activities at school in our auditorium.
Going back, ballet is always misconstrued to be danced by girls only. But let me share you a random fact about ballet dancers. Based on the article I have read, some of the greatest ballet dancer who gave phenomenal performances were Mikhail Baryshnikov and Paul Taylor, awesome is it? (http://www.centralhome.com/ballet-dancing.htm) Here are some videos of their performances.
They're purely awesome, right? And one more random fact, Mikhail Baryshnikov is the world's youngest ballet dancer.
Based on the videos, ballet is not just a dance or some kind of performances or whatsoever. Ballet needs time to learn it well and to master it. Being a professional ballet dancer is not that easy. You need to develop a lot of skill to be one, just like what other forms of dance needs. It also needs your heart and passion in doing it because without these essential things you wouldn't be able to fulfill your dreams as a ballet dancer and as a dancer as well.