Reaching the 100th day of school is a milestone that should be celebrated! Lots of schools invite students to dress for the occasion, often in 100 Days of School shirts. You’ll find lots of options to buy online, but many of the ideas in this roundup are easy enough to DIY instead. Regardless of whether you’re a crafty do-it-yourself type or an add-to-cart type, our list has you covered!

100 Days of School Shirts To Buy or DIY

These 100 Days of School shirt ideas can be as easy as clicking a few buttons on a shopping website. But if you’re feeling creative, you can embellish the shirts for a personalized touch with our DIY tips. You can also just buy a plain tee and create the whole thing from scratch. It’s up to you!

Opting to go the DIY route? Here are a few basic supplies you might need.

More Easy DIY 100 Days Shirt Ideas

Grab a plain tee and a few supplies to make one of these cool DIY 100 Days of School shirts. We’ve provided some suggested text and embellishment ideas, so let the creativity flow!

I Spy 100 Days

Add 100 adhesive wiggly eyes of all sizes to your shirt, along with the text “I Spy 100 Days of School.”

Buy it: Adhesive Wiggly Eyes at Amazon

Clowning Around for 100 Days

Drawn a clown face on the front of your shirt, then add 100 colorful pom-poms to make a 3D rainbow wig!

Buy it: Colorful Pom-Poms at Amazon

I Erased 100 Days

Here’s a great way to make good use of all those mini erasers: Glue them to a 100 Days shirt!

Buy it: 180 Assorted Mini Erasers at Amazon

Cheerios to 100 Days

Count out 100 pieces of cereal and glue them to your shirt. If you’re feeling especially creative, you can show them pouring from a cereal box into a bowl, and glue on a plastic spoon too.

Hanging With My Gnomies

Start with the text “100 Days of Hanging With My Gnomies,” then add gnome stickers. Adorable and easy!

Buy it: 100 Gnome Stickers at Amazon

Popping My Way

Pop up a batch of plain popcorn, then count out a hundred pieces and glue or sew them to your shirt. Add the text “Popping My Way Through 100 Days!”

Mission Complete

Pick up a camouflage T-shirt, then add text saying “Mission Complete: 100 Days of School.”

Buy it: Camouflage Youth Shirt at Amazon

100 Days Brighter

For those who love to sparkle, this is the perfect shirt to celebrate 100 days! Just add 100 gems and the text “100 Days Brighter!”

Buy it: 100 1-Inch Adhesive Gems at Amazon

100 Ways To Make 100

This one’s for all the math lovers out there! Use fabric markers to write 100 different equations that make 100. Examples: 10 X 10, 1,000 / 10, 75 + 25, etc.

I Survived 100 Days

Check out the first-aid section and pick up a selection of different bandage styles and designs. Add them to your shirt to show “I Survived 100 Days of School!”

Buy it: Colorful Bandages at Amazon

100 Days of Growing

Pick up some inexpensive silk flowers and remove the stems, then glue or sew them onto a shirt with the text “100 Days of Growing.”

Buy it: Glitter Foam Flowers at Amazon

Putting It All Together

Write the text “100 Days of Putting It All Together at School” on your shirt. Then, pick up an inexpensive 100-piece puzzle at the dollar store and glue on the pieces, assembled or scattered around.

100 Superstar Days

Start with the text “100 Superstar Days of School,” then add adhesive foam stars for an easy and inexpensive tee.

Buy it: Sparkly Adhesive Foam Stickers at Amazon

Out of the Park

Add 100 baseball stickers (or draw them instead) to a shirt that says “I Knocked 100 Days Out of the Park!” Perfect for young sports lovers!

Buy it: Baseball Stickers at Amazon

100 Sunny Days

Celebrate “100 Sunny Days at School” with a shirt full of sun stickers. Or draw one large sun and give it 100 numbered rays!

Buy it: Sunshine Stickers at Amazon

Have ideas for celebrating the 100th day of school? Come and share in our We Are Teachers HELPLINE group on Facebook.

Plus, check out 100th Day of School Ideas (Activities, Videos, and More)!