I have the privilege to teach at a watershed summer camp this year, as well as mentor their leaders in working with children and presenting programs to them. I've been working with children, especially in a role as a naturalist for close to 20 years and I think the best part of this type of work is when the kids find out something different about nature and it really gets them excited. The Moose and Deer Skulls we found from a winter kill beside a beaver pond were a big hit. Really when you can show and let them get hands on experience in exploring the creatures found in and around the communities in which they live, it really does impact them and my hope is that as they grow up they will have a passion for nature which will define changes they make on the ecosystems where they live. Birds, Bugs, and Amphibians are the main critters they tend to see, catch, and which they can become citizen scientists towards collecting data and identifying what it is that they find. 
I often use nets, buckets, and a water table (picked it up at a yard sale) for the children to use for a lab in which helps for them to see how the specimens interact, see what they are and with the help of Inaturalist we ID as much as we can. We teach the importance of wearing gloves so that the oils, bug spray, and sunscreen we've applied to our hands doesn't get on the subjects we are trying to ID. Some of the best days I've had at camps usually involve Macrobenthic Invertebrates like the dragonfly larvae or the caddisfly with its protective shell made from sticks and stones.
Caddisfly and its Shell
Green Frog, the ridge on its back is a key id feature
Dragonfly, wings out and eye placement are different
from the Damselfly seen below, wings fold behind, more delicate body, and they eye placement
