That roller coaster was so fun!

Life is not all fun.

The comedian was able to fun the audience with his witty jokes and humorous anecdotes.

Let's have some fun at the party!

I like to try new activities for the fun of it.

Don't make fun of others just because they are different.

Let's have fun at the amusement park!

Despite the myriad of obstacles we had to overcome, we managed to engage in such fun stuff, it makes all the hardship seem inconsequential.

We had a fun trip to the beach last summer.

Don't make a fun of him just because he's different.