Some frogs like fire belly toads and some of the poison dart frogs are a lot bolder and would make for a nice show piece for the kids to watch and learn but ya these guys get stressed easy and do better in quiet places. And during the day they bury themselves so the kids would never really get to see him and if you dug him up to show him to the class he would not be very happy. A trick for the crickets when you just drop them in is take the back legs of them, this way they cant use them to rub the dust off and it slows them down a lot which makes it easier for him to catch.