If I don't do it or I disobey you, show me or tell me again. Praise me when I do it right. Do not yell or hit me. I learn more quickly and easily if you teach or show me than if you punish me. Teach me not to play around stairs and windows.
Accidents can happen.
Check the screens on the windows. Make sure the screens are not broken or torn. The screens should be attached securely so I can't open them. Be calm when I have a temper tantrum. It is O.K. for me to cry and scream when I am angry.