I need help with this birthday poem for my dad?

Question:Happy birthday Dad!
You're 51
That's not too bad
We can still have fun

We can bowl, and swim
And snowboard and ski
We can go out on a whim
And go try some sushi

You're the best Dad!
And cooler than ever
________________
I'll love you forever

I can't think of what to put in that empty space. The rhyming pattern is ABAB. I am open to all suggestions. I want this to be perfect. His birthday it tomorrow. Thanks!
Also, What am I supposed to put at the end of each line? A period? A comma? I'm confused.

Best Answer - Chosen by Asker: Happy birthday Dad!
You're 51
That's not too bad
We can still have fun

We can bowl, and swim
And snowboard and ski
We can go out on a whim
And go try some sushi

You're the best Dad!
And cooler than ever
________________
I'll love you forever

I can't think of what to put in that empty space. The rhyming pattern is ABAB. I am open to all suggestions. I want this to be perfect. His birthday it tomorrow. Thanks!
Also, What am I supposed to put at the end of each line? A period? A comma? I'm confused.

that is really good claire! and u dont need punctuation after each line! unless u want to do a "!" but other that that u dont have to and for the empty space thing, u should DEFINATELY put "you always make me glad" but u wrote you will always make my glad! haha

?Your BEST friend so i should be ur BEST answerer!

Oh I am so glad

and i don't see any need for any comas or other punctuation marks other than exclamations!!!!!!!!!

Hope it helps.

Wish ur Dad a very happy b'day

i don't think you put anything at the end of the lines and you could put:
your totally rad
lol idk im not very good with poetry
everything sound good so far I'm sure he'll love whatever you put in.

Good Luck

how about this. changing last 2 lines for

i don't care if your old and gray
i love you more every day

there aren't really any punctuation rules for poetry,
but it does have to be consistent throughout your whole
poem. :D