See, I crocheted one. I didn't have a pattern. My boys found one crocheted alligator at the thrift store and of course they wanted it (couldn't pass it up for it was only $2). But I have 3 1/2 year old twins and ONE of something generally doesn't work around here.
My boys said- Mommy you can make us one! So the rest of that day I spend crocheting away. I had no pattern and I just had to somewhat "wing" it. I think he turned out ok. My boys love it and play with it often.
It's fun making something up on your own AND having it turn out!
Tawnya