I had a Dr. Seuss baby shower, so here is what mine was like. My sister-in-law hosted it and she is very crafty and creative. For the ceter pieces, she got some glass fish bowls and painted the one fish, two fish theme on them. She also bought some flower pots and striped them red and white to look like the Cat in the Hat, hat. She also made copies of the fish, the cat in the hat and other Dr. Seuss characters and cut them out and stuck them on the ends of pencils and put them inside the pots and bowls. (She had cut a styrofoam ball in half and put it inside the pots and bowls so the pencils stood up).
I looked up some thank you poems and this is what I found. Some are kinda cheesy, but it can atleast get you thinking.
While we are waiting
for Baby's debut.
We wanted to write
and say thank you
for the lovely gift
and being a great friend.
The shower would not have been as fun
if you did not attend.
****
I wanted to say thank you.
Daddy says thank you, too.
Baby will say thanks I'm sure
right around when he/she turns two.
*****
Thank you for the gift
that I will soon see.
Mom says it's really great,
and you picked it just for me.
Mom is sending this card of thanks
because I have yet to arrive.
And even when I do,
I won't write good 'til I'm five.
Thank you from Me, Mommy & Daddy.
*****
Thank you for the baby gift
my dear and thoughtful friend.
And when I think of the joy of knowing you
my gratitude has no end.
I hope this helps. If you'd like any other info, feel free to message me. Good luck, and have fun.