Create an obstacle course - that has both cognitive and pysical areas and each child is timed as they go through the course, then they can compare their averages, plan courses and stations, reflect on best/worst, and if the courses are gettting easier. Each station of the room is a distance across the room, or through a few gates, around blankets, furniture, whatever?
Stations can be changed to relevance and each day.
Station # 1 - 20 situps and dial a number on the paper given (cellphone in the room).
Station #2 - 10 pushups, find a word on the paper in the book (named ...) on the table (which, that, who)
Station #3 - Run in place for a minute - solve the riddle hidden under ...
Station #4 - Free throw 5 nerf balls into the waste basket and guess...
Child writes statistics on stats board as recited by another child (in minutes, not nanoseconds). Change Stations each day. Get class feedback as to the course, and the different station requirements.