It is true that there are no statutes ruling what age you can leave your child home alone in Missouri, but that does not mean you can't get in big trouble if you're not careful. The question and answer of what decides if a child in Missouri is safe by themselves at home is complicated.
It made for a very entertaining movie plot, but the question of how old a child must be before they can be legally left home alone in Illinois is a serious question. Plus, Illinois has some of the strictest requirements in the country that could get you in big trouble if a child is below a certain age.