There's a jazz musician, and teacher, called Joan Chamorro. He lives in Barcelona and conducts this school, whose work is amazing. Where I live there are plenty of wind bands, almost one per village no matter how small it is, but they are usually focused on more classical stuff along with some folk, and there is at least one jazz big band (Sedajazz) which teaches kids, too. But hey, these from Sant Andrew play other league. Some of the kids are just 10 and already playing live combos. Hear and judge yourselves:

Learning piano from scratch since September, 2012.
Kawai ES7.Kawai K-200