Toss Coin Variety
You don't have to go into a casino to find somewhere to gamble at; you don't even have to own a deck of cards, no need for chips or tiles or dice. There are tons of gambling games that you can play outside of the casino, although some are not commonly legal.
Casinos are a tax paying business, which gives them a legal right to hold a place that serves gambling games to the masses. If ever there is a gambling place aside from a casino and can rally up a generous amount of gamblers into their place then it will be proclaimed illegal and therefore get shut down by the government. However, gambling can be played outside of a casino as long as only a few or a minimum amount of gamblers are participating.
Coin games are a popular basis of gambling games although you won't see toss coin games in casinos. A simple toss coin game has both fifty percent winning percentage for those people who bet on head side of the coin and the tail side. This is the reason why casinos won't add this game along with their other gambling games. Almost all of the casino games winning percentage favor the houses side, in other words, when you gamble on a casino it's more likely for you to lose. So, you better at least feel lucky when planning to gamble.
There is another variety of a simple toss coin game where you have to play it with three coins. All participating player will then call whether the side that's different among the three is a head or tails. For example two coins dropped heads while the other one is tails, this means tails win. If the three coins dropped at the same side then the game is called draw. There is not much difference from the original toss coin game since the gamble still has fifty percent winning percentage for both sides.
This game has spread on a popular children game played with cards. These cards play the same role as the coins. They'll bet a certain amount of cards before a toss then they'll gamble on whether the game will end in favor of the cards facing up or the cards facing down. If player 'a' bets an amount of cards larger than player 'b' and player 'b' wins, then player 'b' will only get as much money as he bets.
So basically, this card game is the earliest gambling game a child can play without going into a casino, and without the use of real money.