First I crocheted the balloon. I did an magic ring, then increased and decreased as needed.
(there are lots of instructions out there on how to crochet a ball. )
The last 3 rows I made the same as the previous row to give the balloon a neck.
I didn't want to stuff it with filling, I decided to try to make it stiff.
I put a latex balloon inside the crocheted balloon, and blew it up to the right size.