RedactedNarrative: Single Vessel Collision With a Fixed Object. After pulling up to a private dock behind the residence Operator put the motor of a 2015 26' Velocity 260 Bay 300 HP Mercury REMOTE STEERING that he was operating in neutral, he then left from the operators position and stepped to the rear of the boat to hold on to a dock piling in order to keep the boat in position. The 260 Bay was not tied to the dock. While Berel held the 260 Bay to the dock, he and the other adult POB Occupant 1 and Occupant 2 began to talk with people in another boat that was at said dock. During conversation, one of the W/M juveniles on the 260 Bay, a four year old, pushed down hard on the throttle and the grabbed the steering wheel turning it hard right causing the 260 Bay to collide with the private dock, ramp over it and run aground in the backyard of the said address. Both juveniles, 2 YOA and 4 YOA were wearing Child size Type III PFD's. Four adult universal size Type II PFD's were on board but not in use. Contributing factors were Operator Inattention and Passenger Behavior. No alcohol and drug use suspected.