New kids class and schedule changes, tomorrow at Hart BJJ, Boxing and MMA. by Coach Hart | Nov 14, 2014 | Conshohocken Martial Arts New kids class and schedule changes, tomorrow at Hart BJJ, Boxing and MMA. New Saturday Schedule Conshohocken Kids Jiu Jitsu. 10 am *new Kids Class 11 am MMA 12 pm BJJ Basics 1 pm Advanced BJJ 2 pm Open Mat