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.
9. Peter Pan
Hugo, age 19 months, as Peter Pan.
10. Horrid Henry
James, age eight, as Horrid Henry.
11. Nit Boy
Nigel as Nit Boy from David Walliams The Worlds Worst Children.
12. Princess Anna
Kyla, age two, as Princess Anna.