I love this version of  'Crazy Train' and I laugh every time I see all the kids do Ozzy's Ay Ay, Ay, Ay, Ay. Seriously this rocks and these kids are having such an obvious good time.  The group is called the Louisville Leopard Percussionists run by Diane Downs and her assistant Kelsey Lee. This non-profit offers this music opportunity to the local kids of the Louisville area at little or no cost. Brilliant.