We've put together a gallery of 16 great costumes that you sent in to us. What did your child dress up as? Let us know on Facebook and Twitter.
1. Elmer the Elephant
Oliver, age four, dressed up as Elmer.
2. Harry Potter
Sam, age six, as Harry Potter
3. Grandma Bendy
Ayla, age six, as Grandma Bendy
4. Harry Potter
Cenk, age nine, as Harry Potter.