Ozzy loved this cover of his legendary song so much that he decided to give them a nice surprise.

Billboard – Ozzy Osbourne put his money where his mouth was recently when he donated $10,000 to the Louisville Leopard Percussionists, a children’s band that scored a viral hit two years ago with their all-percussion take on “Crazy Train.”

As the Courier-Journal reports (via Rolling Stone), the young Louisville group is a community nonprofit formed in 1993 and is comprised of over 60 students, ages 7-14. After the group posted their giddy take on Osbourne’s metal anthem in December 2012, they quickly racked up over 800,000 views.

Read more: Billboard