A frog in a coconut shellThe rhetoric of proverbs this means someone who is very knowledgeable and told. But actually, with knowledge or experience because of the narrow frame, do not go out to an external lokthat.
Frog in the Shell idioms are proverbs This means that they are very important. But the fact that the knowledge in a narrow range. With less experience because they do not have to face the outside world.
A frog in a well idioms proverbs. Refers to those important his knowledge. But I have knowledge in a narrow range Less experienced because it does not meet with the world outside.