Busch Gardens and Adventure Island are offering a new "preschool card" that allows kids 5 and under unlimited admission to both parks through December 31! The cards are free, but you do have to sign your kid up. The link to sign up is HERE.
By the way, if you're an adult who wants an annual pass, they're offering a BOGO deal for $109. Buy Busch Gardens, and get Adventure Island for no additional charge.
So go have some fun with the family in 2020!