You know something? Many kids try to join the army when they're too young. You're going to learn to use some very dangerous weapons, you know. Young kids like you are not allowed to use dangerous weapons. You have to be old enough to get a licence. I have to find out whether you're old enough before I can sign the licence to let you use these weapons. There are a few tests I'd like you to take which will tell me whether or not you're old enough.

The first test I'd like you to take is called the TIC TAC TOE test. You know how to play TIC TAC TOE or NOUGHTS AND CROSSES, don't you? What I want you to do is , go and play some games on levels 1 and 2, then come back and tell me how you got on.

OK, , tell me how you got on at TIC TAC TOE. I won a lot more games than I lost. I won and lost about the same number of games. I lost a lot more games than I won.

The second test is an ancient Japanese game which has been used for centuries to train Samurai warriors. It's called the SUDOKU test. Again I want you to , go and play some games, then come back and tell me how you got on. Start on the 'Easy' level, and, if you can do that move up to the harder level.

OK, , tell me how you got on at SUDOKU. It's easy - I can solve them in a few minutes. I sometimes do them but sometimes get confused. I don't really understand them - it's too hard for me.

There are also some other games which will help you for the rest of the course. In these games you have to watch for, and react to, your opponent's move. Click here to play JOIN THE DOTS. This will help you practice THINKING AHEAD and also develop your spatial awareness. Click here for a game of DRAUGHTS (CHECKERS). This will again help you think ahead and also help in developing the concept of strategy in board games. It's simpler to understand than chess, but also not at all easy to play well. If you found these games easy you're probably old enough to learn how to play chess well. If you found them hard, be warned that learning to play good chess - which is what you'll be doing if you proceed to the next part of the course, is a lot harder. Maybe you spend a few months practising before moving on. to return to the doctor.