If you have never played Racko before, then I would suggest making a trip to the store and purchasing this game. It is so much fun and can be a great learning tool for kids.
With this game, each player is given a rack to hold their 10 cards that each player is dealt. Starting at the top and working your way down, you put your cards in the rack in the order they were given to you. Then, each player goes around in turns either drawing a card from the discard pile or from the draw pile. On your turn, you can choose to do one of several things. After you draw from one pile or the other, you can choose to replace a card in your deck with the one you drew, or you can choose not to use the card you drew and just discard it for the next player.
The object of the game is to get your cards, not necessarily in numeric order, but in a low to high pattern starting at the bottom of your rack, all the while trying to get this done before your competitors. Also, while trying to do this, you are trying to get sequential sets of 3 or more in your rack to help build up your point value at the end of each round. The first player in each round to get their cards organized the correct way calls racko. The first player to 500 points, or whatever point total you designated wins!
Sound easy? In a way it is, because you are just switching cards in and out, but also you are competing for time, for the best cards and also since you can't rearrange the cards in your deck, you have to work with what you have and what you happen to draw on your turns. It's a lot of fun...check it out!