The child's free link is on the second page of this thread. here is the link:
http://secure.universalstudios.com/...ategoryGroup=UOBrazil&SalesCategory=BrazilTPT
If this page times out go to:
http://www.mousesavers.com/universalorlando.html
Scroll down 1/3 on the page and click the link that says:
Online Buy an Adult, Get a Child FREE Ticket Deal
Buy a 2-Day/2-Park ticket and get three FREE days (making it a 5-Day/2-Park ticket), plus a FREE child ticket with each adult ticket purchased. The price is $109.95 plus tax for the adult ticket and you can print it out yourself for free (thus avoiding a shipping charge). These tickets are good for up to 5 consecutive days' admission to both theme parks and CityWalk. Can only be ordered online through a special link to the Universal Studios web site.