1. Harold And The Purple Crayon
The whole family can get in on this one. Full bonus points for getting grandparents in on it, too. Get the instructions here.
2. The Lorax
Early Mama's handmade Lorax costume even includes a Truffula Tree. Dr. Seuss characters are a costume staple, but wouldn't it be nice to give The Cat In The Hat a rest this year?
3. The Pigeon
This is a guaranteed crowd pleaser for any Mo Willems fan. Designing Mom Jenn's crazy clever Don't Let The Pigeon Drive The Bus! costume is just everything.
4. Harry Potter
Of course Harry Potter is on the list. Patti Milazzo's tutorial is one of the best DIY versions out there, and it would be easy to adapt for a Hermione or Ron costume, too. She even made the sweater. That's real dedication to your kids, people.
5. If You Give A Mouse A Cookie
If you have two kids to dress up this year (of any age), and Laura Numeroff's series is the talk of your household, then this simple Instructables DIY costume is a winner for even the busiest families.
6. Pete The Cat
Library Safari shared this perfect Pete The Cat: Rocking In My School Shoes costume. Who wouldn't love a 4' tall blue cat with a guitar? No one who loves happiness, that's who.
If you have good sewing skills and a love for those twelve little girls in two straight lines, try Simple Simon & Co.'s gorgeous take on Madeline's classic French schoolgirl outfit.
8. The Paper Bag Princess
Robert Munsch's awesome feminist princess is such a great go-to costume if you have brown kraft paper lying around. I made my own version when I was a teacher, but this one from Pan's Cosplay is a little sturdier and much, much cuter.
9. The Very Hungry Caterpillar
You haven't really been through parenthood if you can't name everything that gluttonous caterpillar ate through on Saturday. The Craft Nest's cheap and adorable version is just the thing for your very hungry trick or treater.
10. Percy Jackson
Possibly the easiest costume on this list to create, this one has tons of impact for your Lightning Thief fans. Here, the Jared Johnson Fam fashioned a felt minotaur horn, but you could also add a pen and some cardstock lightning bolts covered in neon paint or glitter.
11. Strega Nona
Tomie dePaola's famous version of the "Grandma Witch" with the magic pasta pot could not be easier to transform into a costume. This version from Rafael Concepcion was put together from clothes you probably already have in your closet. Give your little one a pot filled with yarn spaghetti, and you've made the perennial witch costume into something way more interesting.
Olivia the pig is a total diva, in the best possible way. It takes a certain kind of sass to pull off a red tutu. If your confident, outgoing, and chatty little girl is a fan, this version from The Train to Crazy might just be the costume for her this year.
13. Ladybug Girl
If Olivia isn't a big deal in your house but Ladybug Girl is, rest assured that you can still see a red tutu in action this Halloween. Add some felt wings and make your own headband like Project Caitlin's Life did, and you're good to go.
14. Pippi Longstocking
If you're wondering what to do with that denim jumper that's a little too short for your daughter already (thank you, growth spurts!), stick some striped leggings on under it and follow Make's tutorial for Pippi braids.
15. Peter Pan
Make It & Love It has a simple tutorial for this sweet Peter Pan costume. Easy and made of fleece, so your trick or treater will stay warm well into the night.
16. The Hobbit
Thrift store finds were transformed into this Hobbit costume featured on Costume Works, and the result is pretty epic.
17. Alice in Wonderland
Alice costumes are popular every year, but taking a cue from Misha Lulu and making a cardboard box into a house takes it to a whole other level. Add a snack cake with "EAT ME" written on it, and you've got Giant Alice. Go big or go home.
18. Captain Underpants
This mom dyed white thermal underwear, sewed a pillow into the belly, added a few other details, and voilà. Your kid's favorite semi-naked superhero in a (hopefully!) school-appropriate costume.
19. The Where the Wild Things Are Monsters
Every year at the school Halloween parade there's that one overachieving mom who shows up the rest of us with gorgeous handmade costumes. Autumn Kimball is totally that mom. And if you take inspiration from her quadruplets' costumes, this year it could be you.
20. Hiccup The Viking
I Am Momma Hear Me Roar nailed this How To Train Your Dragon costume. Using fluffy toilet seat covers. Parenting win!
21. Astrid the Viking
And if you have an Astrid fan in the house, Problem of Audience and Purpose has got you covered.