For that much, id suggest talking to the girls in the booth about a yearly pass. The children maybe free but adults are $20 each plus parking $5. A yearly pass was $100 (about) and free parking. You can use it for many of the larger zoos that are connected.
Adults ages 13-64 are $19.95, children ages 4-12 and seniors over 65 are $16.95 and under 4 is free. Parking is $5.
Children under 4 are free with an adult admission. Adults are $19.99 per person and 4-12 is $14.99 I believe
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