This game requires that your child know at least some of the consonant sounds from the alphabet. Start by choosing an object (for example, a table), then substitute the first letter with another one (maybe a 'P'). Say the result, 'pable,' and see if your child can guess which object you're talking about. When they guess correctly, it's your child's turn. If they can't guess it, try something else with the same letter substitution (window becomes 'pindow' for example). Keep subsituting the same letter until your child figures out the pattern. You can vary the difficulty depending on your child's ability. More advanced kids can guess combination sounds like 'ch' 'sl' or 'qu.'