one of the greatest cornsnake breeders in the world wrote a book that is (in my opinion) the best book on cornsnakes in the world. It is "The Corn Snake Manual" by Kathy Love and is available in Petsmart, among a whole lot of other places.
Some things to remember about cornsnakes:
1. Cornsnakes are incredible escape artists! Make sure that the cage is extremely secure. The smallest hole in it can become their escape route.
2. They do need hide boxes, one on each side of the temperature gradient. Make them small hide boxes, they should be able to squeeze their bodies in there and will feel more secure.
3. Use a good thermometer, not a stick on. Put it directly on the substrate, which should never be cedar and some people say never use pine, either.
4. I only feed frozen/thawed mice. A dead mouse NEVER bit a snake! Also, if you are using a loose substrate, such as aspen, feed outside of the cage to eliminate them ingesting any substrate.
5. Baby snakes are very scared that you are going to eat them, so they will make a very impressive display to get you to leave them alone. If they should strike, musk, or bite you, never put them back in the cage. They will learn that it works!
Other people will post more suggestions. Enjoy your snake, they are great! Oh, one last piece of advice: they are addicting, so start looking around for another cage and more supplies now.
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sue