I have a 15 month old, and 4 year old. With my first I didn’t think twice about this, but with my baby I am constantly paranoid and texting to make sure they made it home safe (if they go to the park). She drives him in my car. Lately I am wondering if I should just have her keep him home. She tends to prefer to walk him to the park - but the walk is far, and in LA I also worry about pedestrian accidents as well as now the summer heat.