In Mustang 10U, rather than change the rules of Baseball to make it possible for young people to play the game, it is more logical to change the size of the diamonds, to adjust them to the physical potential of the players.
Use of diamonds matched to their capabilities permits younger players to play in the same proportionate position as the Major Leaguers and to make the same plays as a Major Leaguer. The double play, the squeeze play, the force play, etc. all become probabilities instead of remote possibilities.
Beginning with Mustang Baseball, the players are playing real baseball in accordance with the rules of Major League Baseball as well as specific PONY rules that are in place to supersede the MLB rules where appropriate such as pitching, substitution, re-entry, etc. With scaled down bases and pitching distances, players react quite favorably to the greater challenge of the game and have little difficulty mastering the transition.