Looks like Dave Grohl is helping to forge the next generation of Foo Fighters fans. The frontman has taped a guest-hosting slot with 7-year-old YouTube sensation Ryan Kaji on the Nick Jr. kid's show, Ryan's Mystery Playdate. In a teaser video shared by the network to Facebook, Grohl calls the appearance "the coolest thing yet," noting that his daughter is a big fan of the series. Expect to see Grohl behind the drums, on guitar, and even playing the kazoo. Which other rockers have appeared on kid's shows? Which bands are you listening to with your kids?