Most, but not all, states have a law regulating at what age children can be left alone. The age varies quite a bit from state to state. This general issue came up in another forum I frequent, in which I posted a link that was a compilationof each state's law. I'll have to see if I can find it.
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher