For this game you just need a pack of cards. You can play by yourself, but it's more fun with two or three players.

Shuffle the pack and place it face down. Set a target score for the game, for example 100.

The first player turns over the top card and continues turning over cards, adding together the value of each card, until he/she decides to stop. (Jacks = 11, Queens = 12.) When the player stops, the total is recorded as his/her score. However, if an Ace or King is turned over no points are scored at all, and the turn is finished.

Now the second player starts turning over cards in the same way. Players continue having turns and building their scores until someone reaches the target score. This player is the winner. If the cards are all turned over before the target is reached, just reshuffle the pack and continue.

Alternatively, you could play with the following rules:

If you pick up a Queen or a King, no points are scored and your turn ends.
If you pick an Ace, all your points are lost and you must start again from zero.

Is there a strategy that increases your chances of winning?
How many cards should you risk turning over before you stop?
Does it pay to be daring?
Does it matter how many people play or who goes first?
What difference does the target score make to the game?