100 Days of School Costume Ideas for Kids

by |January 24, 2024

100 Days of School Costume Ideas for Kids

For many kids, the number 100 is a big milestone. Whether it's counting to 100 for the first time or realizing you just hit your 100th day of school, it's a huge deal! The actual day depends on the school district, but many schools will celebrate 100 days of school in January or February. If your child is taking part in these school festivities, they may want to wear a 100 days of school outfit. Check out our selection of centenarian costumes for kids below!


100 Year Old Lady Costumes for Girls

Grandma Costumes for Girls

Girls' Grandma CostumeChild Grandma CostumeOld Lady Costume KitKids' Grandma Costume

Many kids who dress up for the 100th day of school wear centenarian costumes, also known as 100 year old person costumes. Little girls will look cute dressed in floral print dresses paired with comfy cardigan sweaters and spectacles. These grandma costumes already have most of the items included, but you can always add some extra-chunky jewelry and a DIY walker made from PVC pipe and tennis balls for the ultimate 100th day of school old lady costume!


100 Year Old Man Costumes for Boys

Grandpa Costumes for Boys

Boys' Old Man CostumeOld Man Costume KitChild Grandpa Costume

Old man costumes for kids have a few essential ingredients: bow ties, plaid and sometimes a pair of suspenders. These grandpa costumes for boys already include everything minus a cane. But if you'd like to customize your boy's look or he had a plaid shirt that you want to use already, you can always use the old man costume kit for kids that comes complete with suspenders, a wig and a bow tie. Other fun items to add to your boy's 100 year old man costume would be some wire-framed glasses and a sweater vest.


100 Days of School Accessories

100 Days of School Accessories

Faux Leather SuspendersVintage GlassesChild Old Man WigWalking Cane

If you plan DIYing any ideas for 100 days of school costumes, you're probably still going to need to pick up a few costume accessories. Whether you need some costume suspenders or grandma glasses, you can buy all of the accessories you need online at HalloweenCostumes.com! You can also find items like walking canes and costume jewelry, so take a peek to see what you can add to make your child's 100 days of school outfit picture-perfect.


Other School Costumes

Kids' School Costumes

Child No. 2 Pencil CostumeGirls' Miss Frizzle CostumeKids' School Glue CostumeChild Green Crayon Costume
Kids' Sam I Am CostumeMiss Fiona Frizzle CostumeChild Pencil Sharpener CostumeToddler School Bus Costume

Maybe your child wants to dress up for the 100th day of school, but they don't want to wear an old person costume, or they just want to wear a funny costume for spirit week. Whatever the case may be, we have some silly school outfits that are perfect for a classroom setting. Your child can dress like the coolest teacher of all time in a Miss Frizzle costume, or be their favorite school utensil. They can even be their favorite crayon, a childhood staple. Of course, don't forget about other school supply costumes! Your child is going to make their teacher's day.


We hope you have plenty of 100th day of school dress-up ideas for your child. Whether your child is dressing like a 100 year old or handing out 100 pieces of candy to the class, it should be a ton of fun! If your kid needs other costumes for school—whether they're doing a presentation on a historical figure, dressing for spirit week or doing a project as their favorite book character—check out our selection of kids' costumes online for the perfect outfit!

Angela Poch
Angela Poch

Angela Poch is an Inbound Marketing Specialist and Resident Crazy Cat Lady at HalloweenCostumes.com, where she is an assistant editor and covers tutorials, crafting and pop culture. Angela has created costumes and props for Halloween events, conventions and Renaissance festivals.

Some of her favorite costumes include 90s Rogue, a custom Jedi, warrior elf, and some nameless Renaissance pirate. (She’s still figuring out how to make a Jedi light-chakram.) You can find her on Twitter @AngelaPoch1 or her cats on Instagram @stardustnebulanova.

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