What are some of the things you can train a rat to do?

What is the best way to train the rat?

What is the best age to train a rat at?

:)

Not looking for negative reinforcement because I can't imagine hurting such small creatures in any way but thanks for the help!

1. spin, paw, jump into the hand, jump through a hoop, pull a string, going through a maze, climbing up your arm, confident building tricks, and more.

2. go to a quiet place where the rat won't be distracted and give it treats if did a trick.

3. a rat under age 2 tends to learn quicker.

trachea, alveoli, lung capillaries, arteries