If that is the case, direct them and add jumping practice. Draw two parallel lines in the dirt and tell them it's a river they must jump over. Place a hula hoop on the ground and have them jump into the hoop and out again. Roll a ball toward them and have them jump over it before it touches their feet. Or work on jumping high by having them jump up to touch your outstretched hand, or a mark on the wall.
Balls are always welcome toys.
Teach children to bounce with two hands, then one, bending their wrists and pushing with their hand rather than relying entirely on arm strength. Let them bounce balls while walking and moving around obstacles. They can practice throwing overhand using balls or beanbags and tossing them into a container or target on the ground. Gradually increase the distance between the child and the target. As children show skill, add movement-running to catch a ball, kicking a ball toward a goal, or kicking a ball around obstacles, as in soccer drills.