There is another service I have read about called --believe it or not?---"the Fairy Godmothers". (407) 277-3724 and another called "All About Kids" (407)812-9300 or all-about-kids.com I have never used them but at least you have other options out there.
All of them charge extra depending on how many kids you have and all need advance notice and charge a transportation fee and may charge extra if they are there after a certain hour(usually 9pm or later) and may have a minimum amount of hours you will be charged for. Ask when you book them about whether you prefer male or female sitters. Some of the services emply both. And dont forget to ask about forms of payment.
As for the 13 yr old...none mention ages so it doesnt hurt to ask....Hire him for the night if all else fails....lol Hope this helps a bit.
VIXEN DOES NOT GUARANTEE ANY INFO TO BE TRUE OR UP TO DATE>>>>SHE IS JUST QUOTING THE UNOFFICIAL GUIDE BOOK 2005