Like most things, there are two schools of thought.

When you learn to drive a car, most people feel that it is better to learn on a car with an automatic transmission. You have a lot of new things to learn, so why complicate the situation with a stick-shift?

Others feel that you should learn on a stick so you have a better understanding of how cars work.

Personally, I would never tell a kid to learn to drive with a stick... Nor would I recommend a trainer with a tailwheel.