Since their invention in the late 19th century, slot games—often regarded as one of the most popular types of gambling—have undergone substantial change. These were mechanical games at first, featuring three reels and a small seplay slots for real money onlinelection of symbols like lucky sevens, bells, and fruits. In an attempt to align matching symbols for a payout, players would spin the reels by pulling a lever. Slot games now come in a variety of high-tech digital formats with cutting-edge sound effects, animations, & graphics that improve the playing experience. These days, slots can have five or more reels & a wide variety of themes, from popular television series and films to ancient civilizations.