I would suggest that you acquire UVB lighting if you haven't already, because it is very important. I have seen turtles that were kept long term without full spectrum lighting and you can definately see the difference between the ones that have access to UVB lighting. Although I have seen exceptions. Some turtle keepers say that you don't need it for hatchlings if they have a proper diet, and some say you do. Some turtles really need it, while some can do with out it, but RES's definately need it. You can feed your turtles in the kiddy pool to try to calm them down. One thing that I have learned while keeping turtles is that "TURTLES ARE PIGS". My turtles would always panic when I would put them in a container while cleaning their tanks out, but then I started throwing food in and they would forget about being a nervous wreck and go straight for the food. I even have a turtle that will eat while its flipped over on its back. I put him on his back gently and then throw food in the container its in, and it will only care about eating. It won't flip itself on its plastron until he knows that there's no more food. If you take your hatchlings outside for some sun, do not leave them alone unless you are sure they can't be reached by other predators. It only takes a second for him to be lunch for something else.
Joel