I can't remember the name of this children's book?

I read it in somewhere between first and third grade. The main character was a cat and I think she stowed away on a boat and ended up finding some dinosaur friends. She was very crafty and brought a lot of seemingly useless things along to get herself out of any situation. There were lots of made-up creatures. No one has any idea what I'm talking about. If you can think of any book that sort of sounds like this one (my memory could be tainted- this could be a little off), please answer!!!!! Thank you.