What type of weapons do u learn to use in aikido?

Question

and how easy is it to learn them?

Answer 1

you learn how to shoot laserbeams out of your hands

jk. jo (staff), tanto (knife), and bokken (sword). It is more of a non weapon techniques, and you are supposed to go to more hands only classes. As for the difficulty of using them, not very hard, if you are in a small class with a knowledgeable class master.

Answer 2

you learn to use the bokken or wooden training sword, the jo or short staff and you also learn defense against a tanto or knife.

The jo and bokken are both used for offensive and defensive purposes (attack and defense against the weapon.)  

the knowledge of weapons is very beneficial to aikido as many of the empty handed techniques are based on these weapons