SeaWorld Orlando and Busch Gardens Tampa are offering a Preschool Card to kids 5 and under, which is valid for unlimited admission to the park for the entire year. Typically only children 3 and under are admitted free to the parks. This offer is only valid until January 27, 2018. In Orlando, the Preschool Card grants access to both SeaWorld and Aquatica, while in Tampa it grants access to Busch Gardens and Adventure Island. Registration must be done separately for Orlando and Tampa.
SeaWorld Orlando: https://seaworld.com/orlando/tickets/preschool-free-admission/
Busch Gardens Tampa: https://buschgardens.com/tampa/tickets/preschool-free-admission/
In addition to these great offers for kids, Busch Gardens is offering Buy Busch Gardens Get Adventure Island Free Fun Cards! This is also valid for unlimited admission to both parks for 2019 and is a savings of $59.99.
The Fun Card is available here: https://buschgardens.com/tampa/tickets/fun-card/