Admission tickets just get into the zoo, the band gets you into different shows or exhibits and the train that goes around the entire zoo. This is a must to ride when you have walked 6'000 steps and still have move to see.
The bands were used for the train.
Bands provide access to additional attractions like the train, carousel, 4d movie theater, and the campground critters show. You can also buy tickets to these extra items separately within the zoo if you just purchase general admission.
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