‘s Ryan Hunter wanted to help his friends, Avery Monsen and Jory John, who just published a new children’s book, K Is For Knifeball.

So he directed this adorable commercial of two boys seemingly playing ‘knifeball’ that has dangerous results. Now the new commercial has gone viralviral, amassing over 600,000 views in just three days. It is further featured on popular sites such as LaughingSquid, CollegeHumor, and TheAwesomer.