His curiosity and success at walking keep him in perpetual motion as he seeks to move, to learn, and to establish his independence. Your toddler's capabilities for exploration will undoubtedly begin to take him beyond the limits of safety or appropriate behavior. Some of his behavior will be his way of asking you to set limits. When your toddler is tired or stressed, he may need you to help him set a limit on his activity . On these occasions, he may need for you to step in and set a limit for him.
Every toddler needs the assurance that somebody bigger is in control.
As much as he enjoys gaining independence, his safety and security depend on his knowing that you love him enough to provide limits for him. He needs to practice his independence, but not by crossing the street or climbing up to the medicine cabinet. You will have to choose when to let him have control, and when to require him to accept your limits for him.