I'm sure it's due to preference of the turtle, but I've seen a few YouTube videos where a Box turtle was thouroghly enjoying having his shell scratched with a smoothed off wooden pole!
To see this video on youtube go to the 'related links' section and click on the link.
They are safe in their shell.
Upper shell is the carapace, and the lower shell is the plastron.
Box turtles are easily recognized by their box-like shells. Because of the box-like structure, the turtle is able to fit completely inside its shell.
They can close their shell like a box.
Box turtles get their name from their shells, which they can close up completely like a box when frightened. The "boxes" on their shells are plates, or scutes. They are fixed, not hinged. A box turtle's shell, or carapace, is usually covered in repeating or stamped patterns in shades of black, brown, yellow and orange.
Yes, box turtles are usually safe to handle, they don't usually bite, just hide in their shell. All you have to remember is to wash your hands when you are done.
Box turtles have a high domed shell, which is hinged at the bottom, allowing the animal to close its shell tightly to escape predators.
They use their fins like most turtles
There are 16 species of turtles in the Everglades. These animals like to lounge in the sun, warming themselves and providing relief from leeches and algae which grows on their backs. One of the most common turtles in Everglade National Park is the Box turtle The box turtle has a humped shell with a design on it. The design looks like many tiny yellow firecrackers. The rest of the shell is brown with a yellow stripe on the top of the shell. On its neck it has small brown stripes. Also its legs, tail, and head are a yellow-brownish color. Here is a link to the Everglades with all the information you could need including about turtles.
A turtle. and define what you are thinking is a "protective shell"
nope
The only box turtles indigenous to Kansas are the Ornate box turtle and the Three toed box turtle. They both grow to an adult shell length of 6 inches. The biggest box turtles are Gulf Coast box turtles (not in Kansas) and they can grow to 8 inches or more in length. To answer your question, the state they are in has no affect on how big they grow so if you put a gulf coast box turtle in Kansas it can still grow to 8 inches or more.:-)