I am exciting???

I was just talking to my son and he reminded me of a very common mistake students of English make.He said to me...

"We are going to Hiroshima tomorrow. I am exciting!"

..when he really wanted to say "I am excited"

Adjectives like exciting/excited come from verbs, in this case to excite but the -ed and -ing endings are different

-ed is used for your/others' own feeling.

I was frightened
I am excited
He was worried about the test
She was really bored at the event

-ing is used for situations

The film was frightening
His story was really exciting
That news is worrying
That book was so boring

Hope this helps