Middle school is a time when puberty separates the weak from the strong, the hell-raisers from the peacekeepers, the headbangers from the nodders "“ and it's the music that drives the wedge. Thankfully the conductor of the Louisville Leopard Percussionists had the good sense to teach these kids Ozzy Osbourne's "Crazy Train" and empower them with the fierceness that is cold, hard, classic rock. In lieu of flaming axes, these tweens wield mallets and xylophones, and some drum sets. What the band lacks in amplifiers and blaring metallic sounds that'll melt your eardrums, they make up for in spirit and precision. They're keeping rock alive!