In general, expect that players will become more coordinated as they grow older. Players who are u8 often are uncoordinated, and cannot do moves which are simple for players just a few years older. Patience and practice are keys to developing comfort on the ball. As you demonstrate moves for your players, work with them on keeping the upper body relaxed and learning to bounce on the balls of their feet. Jumping rope is an excellent way to develop the muscles used in dribbling.
Many coaches find that it helps to play music while working on ball touches.
However, even with much practice, younger players often will not be able to execute a fake as believably as an older player unless they are very limber. The description of moves will include the mechanics and will always be described for use with the right foot. Do a slight skipping step on the left foot, while simultaneously tapping top of the ball with the sole of the right foot. Put ball towards NW at an easy reach. In some parts of the country, the Vee starts as above.