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Completed DIY 100 Mermazing Days of School shirt.

100 Mermazing Days of School

January 3, 2023 Sarah Coggins
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Last year my daughter’s first grade class celebrated their 100th day of school with an optional dress up day. She wanted a 100 item shirt. Seemed simple enough. We came up with a plan (mermaid theme + shells) and quickly the 100 Mermazing Days of School shirt became a reality.

First grader modeling DIY 100 days of school t-shirt and coordinating mask.



Working with a solid t-shirt we already owned, I started making a plan. The light teal was the perfect backdrop for a mermaid shirt. I didn’t see anything I particularly loved online so I started my own basic design. I laid out the wording in Silhouette using 2 different fonts. Then planned various sizes and colors of seashells + starfish around.

Using my Silhouette Cameo, I cut out strips of seashells in 5 different colors of heat transfer vinyl – solid and glitter.

Seashells cut from heat transfer vinyl in 5 different colors.

I carefully placed each shell one by one onto the shirt. Mixing styles, sizes, and colors to keep it interesting. My Cricut EasyPress Mini was the perfect size to carefully press each one into place.

Placing HTV shells on shirt and pressing using Cricut EasyPress Mini.
Placing heat transfer vinyl to press onto shirt for 100 days of school celebration.

I kept placing shell by shell until we had 100 individual seashells and starfish covering the front of the shirt.

100th Day of School

She was excited and ready to wear her 100 Mermazing Days shirt to school. It paired perfectly with a light teal hair bow and her Ariel mask.

First grader modeling her 100 Mermazing Days shirt + Ariel mask.

About Me


Hi! I'm a DIY and craft obsessed mom to 2. I have my hands covered in sawdust or paint any given day. My husband and kids join me in many of our projects. When we aren't creating at home, we're creating memories in our many adventures. Join along! Read More


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