Amphibians are the "canary in the coal mine" as they are an indication of water quality. Some parts of the world, amphibians are disappearing due to the lack of environmental standards for air and water quality. For funsies, turn over leaves in sinkholes or around a spring. When we camped, I would take the kids on a salamander hunting expedition. We would put one or two in a bowl of cold water and watch them for a while. We always turned them loose.
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