Kelsey Grammer and his family were spotted hitting the Malibu shops this weekend, and it was hard not to smile at his son's super cool rocker tee.

Part of Trunk LTD's line of authentic concert tees ($20 and up), the Black Sabbath shirt is a little bit retro rock and perfectly California casual. The comfy collection features prints from some of the most popular concert tours of all time, and though most kiddos will have no idea who the artists are, parents at the playground will be tickled by the tribute tees.