Boo Hissss! (Sorry, my DH is a locksmith and Pop-A-Lock is competition.)
And yes, most locksmiths will unlock your car for free when a child is locked in. DH gets to be a hero about once a week! Oh, AND it's a priority call. When the call comes in, ALL calls are second fiddle to a baby in a car. A pet locked in a car is also a priority call, just one step below a child.
However, would you believe that they occasionally get a call when someone claims they've locked their baby in the car, just to get priority service!?! When that happens to DH, he gets there, sees that there's no child in the car, then gets back in his car and leaves without unlocking it. And tells the customer he'll be back later, IF he feels like it.
Sorry for hijacking!