We've found 14 costume ideas on Instagram that will be easy to make or buy in time for World Book Day on Thursday 3 March.
Road Dahl's Matilda is an easy costume to pull off with the one necessary accessory - red ribbon in their hair.
2. Pippy Longstocking
Create Pippy's signature ponytails by weaving pipe cleaners through your child's plaits.
3. Paddington Bear
With some simple accessories - the brown tag, sandwich and small briefcase - Paddington is an easy costume to create.
4. Harry Potter
Either buy a signature cape online or create your own, not forgetting the zig zag forehead scar.
5. Queen Of Hearts From 'Alice In Wonderland'
This one might take a little more planning, but just remember - as many hearts as possible.
6. Stick Man
The famous book character created by Julia Donaldson can be made completely from cardboard (and some green and brown clothes).
7. Witch From 'Room On The Broom'
Another one of Donaldson's characters is the crazy witch from 'Room On The Broom' - the star-topped wand is an essential.
8. James And The Giant Peach
Although the costume for James can be pretty flexible there is the issue of locating a large giant orange ball to resemble a peach.
9. Mrs Twit
From Roald Dahl's 'The Twits', parents can get creative for Mr or Mrs Twit with some backcombed hair and slightly messy clothes.
For children with long blonde hair, no costume is necessary at all - for others a long, blonde wig will do the trick.
11. The Hungry Caterpillar
There are tons of costumes online for the all-time favourite book character - our guess is this one will be a little harder to make.
12. Dr. Seuss' Thing 1 and 2 (or 3)
With a crazy blue wig and a red all-in-one, it'll be pretty obvious who your child is dressed up as.
13. Willy Wonka's Golden Ticket
Who says you can't get a bit creative with the characters?
14. Aslan From 'The Lion, The Witch And The Wardrobe'.
Any lion costume is easy to pick up, just make sure your child can make the fearsome face to match.
If you have any more costume ideas, let us know in the comments below.
Macklemore's daughter Sloane was a strawberry for her first Halloween.
Nick and Vanessa Lachey and their kids Camden and Brooklyn went as characters from "Toy Story."
The actress' adorable daughter Genesis just wanted to be her mom for Halloween. On Instagram, Davis wrote: "The Elsa costume? Didn't work for her. The Pirate? A no go. So she finally said, 'I just want to be YOU mommy'! So... uhh....this is ME."
Shakira, husband Gerard Piqué, and sons Milan and Sasha dressed as Topo Gigio, a Spanish cartoon from the 60s.
Naya Rivera's son Josey celebrated his first Halloween as a skeleton.
Mariah Carey dressed as a witch, while dem babies went as Batman and Bat Girl.
On Twitter, Katherine Heigl wrote: "My ladies embracing their Halloween characters! The regal winter garden fairy and the unpredictable Mother Nature! " Heigl adopted her two daughters, Nancy and Adalaide, with her husband Josh Kelley.
Pink, her husband Carey Hart and their daughter Willow dressed as the characters from "E.T."
Jessica Simpson's daughter Maxwell in cat makeup.
Kourtney Kardashian and kids -- Mason, 5, Penelope,3, and Reign, 10 months -- dressed as superheroes.
Beyonce, Jay-Z and their daughter Blue Ivy went as characters from Eddie Murphy's 1988 comedy "Coming to America."
Gisele Bundchen and Tom Brady's kids went at Nemo and the Hulk for Halloween.
Neil Patrick Harris, husband David Burtka and twins Gideon and Harper channeled "Star Wars" characters.
Zoe Saldana's adorable twins Bowie and Cy in matching skull costumes. The "Guardians of the Galaxy" actress welcomed her twins last November with husband Marco Perego.
Alyssa Milano and her family dressed as the cast of "Despicable Me."
Kelly Rowland and her son Titan wore matching Mickey and Minnie costumes.
Jessica Alba's daughter Honor went as a princess.
Gwyneth Paltrow and her look alike daughter Apploe wore matching skull face paint.
His other daughter, 11-month-old Frances, went as Farrah Fawcett.
Jimmy Fallon dressed up his two-year-old daughter Winnie as Margot Tenenbaum.
Fergie, Josh Duhamel and their son Axl dressed as Catwoman, Batman and a clown.
Kim Kardashian's daughter North West and Kourtney Kardashian's daughter Penelope Disick wore matching "Frozen" costumes for Halloween.