The Thrill of PPG
You are the fourth rider in five flag, it's the last race of the day and you are in a tie for first with another team.
You watch and yell encouragement to your first three riders. They've been fast, but not quite fast enough and it is still neck and neck between the four teams. You move up to take the hand-off from the third rider. You ask your pony to start to move just as the third rider comes over the finish line so you are already moving when you take the hand off. . .
You gallop to the far cone, neck and neck with the other teams. You remind yourself to ride your own race and not to watch the other teams, but you can't help taking a peek as you get close. You see that one other team has pulled slightly ahead. You look back to your own lane and the cone in front of you. You lower the flag, and aim for the hole in the cone. You turn your pony around the cone and place the flag in it as you turn, then gallop towards home and look over to see that you have caught up with the other team and its neck its neck again.
You approach the last cone and hear your friends cheering your team on- you are at a flat out gallop now and just beside the last cone, in a up-and-back motion, you pull the flag from the cone- it wobbles but stays up! You look up and see the other team's right beside you. . .
You close your legs for a little more speed. Everything seems to be going in slow motion as you approach the finish line . . . you put your head down and push with your legs! You look over as you cross the finish line and see that you are just a nose ahead of the other teams.
Your team has won! This is just a taste of the fun Prince Philip Games can be... (with thanks to Brian Morton)
Prince Philip Games (PPG) is a program of teams of riders doing relay-type or gymkhana games on horseback. PPG is for riders up to 15 years old, but there are also Masters Games for PPG graduates. 
PPG and Masters Games Rules 2003 has the complete set of PPG rules. Its a large document, starting on page 7 are the general rules that every compeditor should read.
Margot Vilvang has assembled a checklist of things to bring on a PPG play day..
In Simple Tips for Starting PPG Brian Morton, who has trained three of his own ponies to do games and rode for Canada internationally, explains what is involved for you and your pony.