Lil Kids-The use of guard in jiu-jitsu; specifically Closed-guard. Understanding how create or take away distance when you have placed your partner in your guard. Using the Hip-bump sweep to reverse the position and end up on the mount position.
Big Kids- How to do a sit out when your partner is on top and the kids are in a turtle position. Upon sitting out they can take them down with a double leg or acquire the back with chest to spine connection.