The origin of the word "fungo" is unknown and argued upon as there are many possible options as to the origins of this unique word. It is assumed by many to be derived from the Scottish word fung meaning to pitch, toss, or fling. This would make sense, as fungo bats are designed to do just that. Or, the alternative to this origin is that fungo comes from 1937 where David Shulman, writer for the American Speech, said, "My guess is that the word, which is baseball slang, may be explained through the elements of a compound word, fun and go." Lastly, a third belief is that the word fungo comes from an old game, similar to that of baseball, where the players used to chant, "One go, two goes, fun goes." 
As I had previously mentioned, the amount of teaching points is limitless.  The length of the game will really depend on how often you stop the action in order to discuss points related to base running, backing up throws, fielding techniques, and etc.  If you have assistant coaches, have them distributed throughout the field in order to help with certain teaching points on the spot, thus eliminating full stoppages of the game.  Now get out there and start putting the “FUN” back into fungo. I know that’s pretty corny, but I couldn’t help myself 🙂
Before we get started, we have to define the word "fungo" or "fungoes." To summarize, fungo (fungoes for plural) is a ball tossed into the air by the batter and struck as it comes down during practice sessions.  If you are a coach, you are more than likely familiar with a fungo bat. Or, if you are a player who has ever worked on ground balls or pop-flys in practice, you should know what a fungo bat is, as well. For the rest of us, a fungo bat might as well be a foreign object. What is that oddly shaped, extra long practice bat? So, let's answer the most common fungo bat questions:
There are limitations to how much and where a baseball player may apply pine tar to a baseball bat. According to Rule 1.10(c) of the Major League Baseball Rulebook, it is not allowed more than 18 inches up from the bottom handle. An infamous example of the rule in execution is the Pine Tar Incident on July 24, 1983. Rules 1.10 and 6.06 were later changed to reflect the intent of Major League Baseball, as exemplified by the league president's ruling. Rule 1.10 now only requires that the bat be removed from the game if discovered after being used in a game; it no longer necessitates any change to the results of any play which may have taken place. Rule 6.06 refers only to bats that are "altered or tampered with in such a way to improve the distance factor or cause an unusual reaction on the baseball. This includes, bats that are filled, flat-surfaced, nailed, hollowed, grooved or covered with a substance such as paraffin, wax, etc." It no longer makes any mention of an "illegally batted ball". In 2001, MLB approved the use of Gorilla Gold Grip Enhancer in major and minor league games as an alternative to pine tar.[23][24]
Fungo bats are typically only used by coaches, to consistently place grounders and pop flies to their fielders for practice purposes. And with a fungo bat in their hands, some coaches can pull off wicked accuracy – as one story goes, the late California Angels player and coach Jimmie Reese once shot an 82 on an 18-hole golf course using nothing but a putter and a fungo bat.

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Catcher's equipment - A catcher is the target for the pitcher, so the catcher must wear protective gear that covers the majority of his body. Catcher's gear includes a helmet with a faceguard that is similar to a hockey goalie's mask, a chest protector, shin guards, and a special padded glove. Some catcher's also wear devices called knee savers, which are triangular pads that attach to the players calves and rest his knees even while squatting behind the plate.
Fungo bats have been around since the beginning of baseball and as most of us may know, baseball was said to be invented by Abner Doubleday in Cooperstown, New York during the summer of 1839. Since fungo bats were much easier to swing and gave off a ton of pop, they were almost seen as cheating back in the day. In a book from 1897 named "The Technical Terms of Baseball," the sportswriter Henry Chadwick stated,"The weakest batting is shown when the batsman indulges in fungo hitting." It wasn't until baseball bat regulations came around that fungo bats were only used by coaches and parents. 

Chris Coste, a former catcher for the Philadelphia Phillies who coaches at Division III Concordia, in Moorhead, Minn., agreed. “When baseball is every single day, you’ve got to do things differently,” he said. “In the big leagues, they get so many ground balls during batting practice that infield is more for the fans and more for the scouts and things like that. At this level, we need it, and we love doing it.”

First-base coach Daryl Boston has been working Palka with fungo drills. — Phil Thompson, chicagotribune.com, "Yoan Moncada has untapped power from right side, Rick Renteria says," 23 May 2018 While the Angels took infield before the Texas finale Wednesday, Ohtani stood by the cage with a bat in his hand waiting for BP near where Scioscia was hitting fungo to some infielders. — Stephen Hawkins, chicagotribune.com, "Shohei Ohtani eager for more as Angels balance work for 2-way star," 12 Apr. 2018 And dad liked to take us to Lincoln Park and hit fungos to my twin brother, Javier, and me. — John Hickey, The Mercury News, "Adam and Will Rosales proselytize for baseball," 11 Apr. 2017 Since then, his only baseball activity has been hitting one-handed fungos to teammates in ground ball practice. — Nick Groke, The Denver Post, "Colorado skipper Bud Black faces the Padres with a new perch; Rockies still scanning Desmond, Dahl and Murphy," 10 Apr. 2017

Though entertaining enough, this play appears in its entirety as a small part of Sorrentino's magnum opus MULLIGAN STEW. You can read it as easily there as in this form. Plus you'll have the rest of Mulligan Stew as well. So I recommend you only buy this volume if you're the sort of collector who owns books because of what they are, not what they say.
Even in those formative years, authorities on the game warned the practice of hitting fungoes should be limited to coaches. Henry Chadwick, one of baseball’s earliest proponents, claimed “The weakest batting is shown when the batsmen indulges in fungo hitting,” according to the Art of Batting. Others agreed that the practice was bad for training a batter’s reflexes: “While watching some of our freshmen practicing ‘fungo’ batting the other afternoon it occurred to me that it was about the worst kind of practice a batsman could imagine in training his eye in batting,” a writer claimed in the March 3, 1886 edition of The Sporting Life. “It trains the eye to meet the ball in batting it in a manner which never occurs in actual play. It ought to be prohibited on every well regulated ball field.”
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