looking for toddler safety advice
Now that it's getting warmer, our kitchen door is always open, leaving just a screen-type door between my just-turned-2-year-old and the outdoors. The latch is one of those really simple push ones and it's only a matter of time before he opens it and lets himself out. The door opens onto a deck (which is pretty safe) but if he goes down the steps he's on the driveway near the road. It's not a busy road, but still, I don't want him in it! I could keep the kitchen door closed, but it's not realistic with a 5 year old and an almost 4 year old who are in and out all day on their way to play in the yard. Obviously, I need to keep a close eye on the 2 year old and keep him in unless I'm with him. But, I'm worried about the one time he falls through the cracks for a moment (likely during one of my numerous bathroom trips, courtesy of coming baby #4).
We do have two other doors to the outside. The front door goes right to the street, so we can't switch to using that one. The other goes to the backyard, but is heavy and swings closed hard and pinches fingers. To top it all off, we're renting, so we can't just replace the door.
Any advice on how to either secure the door so the older two can get in and out but he can't? Or any other clever solution?