Before doing anything else, you will need to make sure that you know how the game works so you can teach your children accordingly. Next, place all of the tiles face down on the table and have each person take 7 of them. After you have your tiles, each person should turn their tiles over and quickly try to form words.
The first person to use all of their tiles would call "draw," and each person would pick up a new tile. This new letter must be integrated into the existing puzzle rearranging their puzzles if necessary. Once again, the first person to use all of their tiles would yell "draw." Failure to call "draw" can result in confusion for other participants.
Keep working the new letters into the individual puzzles until all of the words are used up. Each hand can last a number of seconds or minutes and if everyone is stuck, you need to decide to call "draw" again. While it will take a few hands to go through all the tiles, the game will go quickly and therefore the kids will have more fun playing it.
When you are done add the scores of each individual words, shared letters are counted each time and any leftover letters are subtracted. This counts as 1 round and will go very quickly. Before you start, you will need to decide how many rounds you plan to play. If you only have two people, 2 or 3 hands are plenty. If you are playing with a lot of people, you may want to do several rounds.