Birthday Invitation Message

I will celebrate my birthday girls. They are the party (no surprise).
The first is the age of 21 and 18 others.
Can someone help me find a funny message for the invitation?

Come celebrate a legal age to drink () 21yr old name,
and age for us to kick () 18yr old name on the door to the university.

Maybe not what you want, but what are the things that have been signifigant with these ages for me.