The original slots were made of cast iron, with three metal hoops called reels. The now iconic fruit symbols would only be introduced by Herbert Mills in 1907, who created knock-offs of the Liberty Bell when Fey refused to sell distribution rights. The Liberty Bell featured three spinning reels with diamond, spade and heart symbols. The world’s first slot machine was the Liberty Bell, created in 1895 by a car mechanic called Charles Fey. Let’s show you how slots work and whether the house can control them. When you play online slots for real money, you can trust that the game is fair and that results are random if your casino is licensed and audited. With little behind-the-scenes knowledge, new players wonder if a casino can secretly control slots and cheat them out of their winnings. But how these games work remains a mystery to many players. Slots are random and unpredictable and require almost no skill while offering enticing jackpot prizes. There are many advantages to playing slots online.