To play blackjack for real cash, both at a legal on-line site or at a land-based casino, you should be 21 or older. At some tribal casinos in the US, it is attainable to find 18+ casinos. If you’re 18 or above, you can play sweepstakes blackjack. Anyone can play free blackjack because there’s no real cash involved. In Blackjack Switch, every participant is dealt two hands as a substitute of one. Players can change the top card between the arms if they wish.