You will need a 5 by 5 square and a dice.
Place your dice in the top left hand corner.
Whatever number is on the top of the dice, write it down on the square.
Follow the green line on this grid as a route by rolling your dice, writing down the numbers on top of the dice as you move along. You can see in this video how it might be started. Have a good look at what's happening and then carry it on in a similar way.
When you've filled all 25 squares with numbers, EXPLORE!
What do you notice?