100 Pom-Pom Shirt
Glue 100 colourful pom-poms onto a plain T-shirt in ten rows of ten, or in the shape of a big “100”.
45 min Cost $ 5 items
22 100th Day of School Ideas
Shirts, dress-up, projects, classroom activities and snacks for the 100th day of school. Not sure when it is? Use our free calculator.
22 ideas
“Watching You for 100 Days” Googly Eyes Shirt
A shirt covered in 100 googly eyes with the slogan “I’ve been watching you for 100 days”.
40 min Cost $ 4 items
100 Mini Dinosaurs Shirt
“I’m 100 days roar-some” with 100 small dinosaur stickers or felt dinosaurs.
40 min Cost $ 4 items
Building Brick Shirt
Ten rows of ten small building bricks (or brick-shaped felt) glued onto a shirt.
50 min Cost $$ 3 items
100 Fingerprint Dots Shirt
Your child stamps 100 fabric-paint fingerprints onto a shirt — easy and very personal.
30 min Cost $ 5 items
100 Hearts Shirt
100 heart stickers or felt hearts — handy because the 100th day often lands near Valentine’s Day.
35 min Cost $ 4 items
Gumball Machine Shirt
Draw a gumball machine and fill the globe with 100 pom-pom “gumballs”.
45 min Cost $ 4 items
100-Year-Old Granny Costume
The classic: cardigan, glasses, a shawl and a little talcum powder in the hair.
20 min Cost $ 5 items
100-Year-Old Grandpa Costume
Braces, a flat cap, a cardigan and a drawn-on moustache make an instant 100-year-old.
20 min Cost $ 5 items
“100 Days Smarter” Superhero Cape
A felt or pillowcase cape decorated with 100 stars and a big “100” logo.
40 min Cost $ 4 items
100 Dalmatian Spots Outfit
A white top with 100 black felt spots — add ears on a headband for a full puppy look.
45 min Cost $ 4 items
100th Day Crown
A card crown decorated with 100 gems, stickers or drawn dots — great as a classroom craft.
20 min Cost $ 4 items
100 Things Poster
Glue 100 small objects onto a poster in ten groups of ten — cereal, stickers, buttons or pasta.
45 min Cost $ 4 items
100 Cereal Hoop Necklace
Thread 100 cereal hoops onto string, changing colour every ten — then eat it.
25 min Cost $ 3 items
100-Brick Tower Challenge
Build the tallest tower possible using exactly 100 building bricks, then measure it.
30 min Cost $ 3 items
100 Cup Tower Challenge
Teams race to build a tower using exactly 100 plastic cups — a classroom favourite.
15 min Cost $ 2 items
100 Seconds Challenges
How many star jumps, words or drawings can you do in 100 seconds?
5 min Cost $ 3 items
“When I’m 100” Writing and Drawing
Children draw themselves aged 100 and finish the sentence “When I am 100 years old I will…”.
10 min Cost $ 2 items
Guess the 100 Jar
Fill jars with different amounts and children guess which one holds exactly 100.
15 min Cost $ 3 items
100-Piece Counting Trail Mix
Each child counts ten pieces of ten different snacks to make a 100-piece trail mix.
20 min Cost $ 3 items
100 Snack Count Mat
A 10×10 grid mat: children place one snack in each square until they reach 100.
10 min Cost $ 3 items
100th Day of School questions
When is the 100th day of school?
It depends on when your school year started and how many days off you have had. For most US schools that start in late August, it lands in late January or February. Use our 100th day calculator to work out your exact date.
Why do schools celebrate the 100th day?
It is a milestone that makes counting to 100 concrete for young children, and a fun mid-year celebration.
Do I need exactly 100 items on a shirt?
Teachers love it when it is exactly 100 — counting into ten piles of ten first is the easiest way to be sure.
What is the easiest last-minute idea?
A 100-fingerprint shirt or a 100 things poster both take under an hour with things most homes already have.