You can make one at home or find at playground. Work on walking straight, walking side ways walking backward Obstacle course- home made using chairs, other household items. Start simple and then make more complex Walks- going on walks has really been a key. We go on very long walks and runs now. We now run at the track but we worked up to this.
Good centers know where to start the children according to their ability.
This has really helped my son with motor planning where he is putting his feet. Jumping off things- when he was younger, we worked on jumping off a curb, then jumping off a step and moved up. We recently had a physical therapy evaluation and our physical therapist came up with a list of activities for us to integrate into our son's ABA program. In other words, they will help his stumbling, leaning and bumping into things. On the floor , roll with arms overhead, keeping arms up and legs out straight.