Have fun with it and enjoy yourself,

The thing I think I'm missing the most is she was so much fun.

It's going to be fun, probably pretty rough and hectic,

My teammates are great. It's fun to run with them. I also like the competition - trying to beat the other team.

Debating against him is no fun, say something insulting and he looks at you like a whipped dog.

We can't get out, so we might as well have fun.