Watch the video of The Cat in the Hat.
If you have the book you could read it instead or even read along.
Then you can:
Make a list of all the rhyming words.
Write your own rhyming story.
Create your own cat in the hat hat. There is a picture of one already made and you can follow the instructions on the link if you need to.
Do one, or do them all, it's up to you.