A playground mosh pit, three kids, and a punk anthem.

A Southern California punk band called No Surrender has racked up nearly five million views with a cover of Sum 41's "Fat Lip," performed to a playground full of moshing kids. The band is three members, all 13 and under. Typhoon, the 13-year-old singer and bassist, and 9-year-old drummer Bobby Jonez are brothers who wanted to play together but needed a guitarist. They found ShredZilla, 12, through their music school. The plan was a few cautious jam sessions before committing. "About halfway through the first jam session, it was clear that these kids were destined to be best friends and play music together," one of the boys' moms told Upworthy. Within three weeks they had a full set and a first gig. The lead singer performs in an orange arm cast with a matching cap. Sum 41 saw the video and weighed in with four words: "The kids are gonna be alright."