[Source: Sensory Edge]
One issue that can develop with young children is an inability to cross the midline. This means that a child will not take their hands or arms across the center of their body. For example, if you are holding something in your left hand and you want to pick something up off your desk that is on your left you generally use your right hand to reach across and pick it up.
Children who have trouble crossing their midline will either not reach for it, scream, or if you are lucky they will simply change hands or put the original object down. It is good to encourage children to develop this skill early because it helps them develop the connections between the left & right sides of their brain.
To promote this skill get your child to reach for objects just outside their grasp, or have them draw a line vertically down a piece of paper and have them color the left side with their right hand.