Travis Barker spent some time over the Memorial Day weekend bonding with Kourtney Kardashian‘s youngsters! The drummer, 45, took to Instagram on Memorial Day, May 31, and shared the sweetest video that featured the 41-year-old Keeping Up With The Kardashians star’s youngest son, Reign Disick. In the clip, which you can see below, Travis could be seen at the top of a giant blue and yellow water slide getting ready to take the plunge.