Players can choose to play the Carnaval mobile slots gratis, for as long as they want. No signup or registration is required. However, those players who are at least 18 years old, who feel lucky, can also decide to bet some real cash and hence get some real cash winnings out of the game. In order to do so, it is necessary to sign up for a game account. Once the account has been created, it can then be recharged with money, for gambling. In addition, players may benefit from special offers and promotions, for their payments. This does allow for some nice extra perks and is a great help in order to get started.