Well, I think a combination of screens and animatronics would work very well. In particular I believe that the old "Million Dollar Bunny" mechanism will work wonderfully for the new frog.
Folks often complained that the old "Million Dollar Bunny" had some mechanical problems that caused it to malfunction sometimes. Well that type of mechanism would be perfect for an animal such as an ectothermic frog.
During the times when the machine is working right, they can light the scene brightly as if the sun is brightly shining and giving the frog lots of energy. But when the machine is working poorly and the frog hopping erratically, they can dim down the lighting on the scene to simulate a colder time when ectotherms slow down and/or stop movement entirely.
This would serve as both an entertaining and educational part of the attraction. Perhaps they could have a screen to tell the guests which mode the frog is in and why the frog moves in the fashion it does.
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