Here's how it works: (taken from www.clemetzoo.com)
On Mondays, the Zoo (not including The RainForest) is FREE for residents of Cuyahoga County and Hinckley Township.* From Memorial Day through Labor Day, if Monday is an observed holiday, free Zoo admission applies on Tuesday instead. If you qualify for free Zoo-only admission on Mondays, tickets for The RainForest may be purchased at the following rates: Adults (12 and older) are $5.00, Children (2-11) are $3.00, and Children under 2 are free.
*To confirm your residency, bring your driver's license or state I.D. or a current utility bill with your Cuyahoga Cty. or Hinckley Twp. address along with a photo ID.
Are you going to wild out at the zoo this fall? Haha... like my play on words?