Fun Pi Day Activities + A Pie Recipe!

pi day activities Fargo Mom

Pi Day is on March 14th and there are plenty of Pi Day activities you can do to celebrate! Math can be so fun. I get a taste of it most days with a mathematician for a husband (don’t tell him, but I actually do like math). There are plenty of ways I encounter math every day. I love baking. I enjoy art. I use money. I have kids who do math homework. I have some fun Pi Day activities to have some fun at your house. Plus, there’s a recipe at the end!


Starting with the obvious Pi Day activity: a Pie Party! Pizza pie, apple pie, ice cream pie, you name it! Before enjoying each of these pies, you can take the time to measure the circumference and do the math. You can then add a little fun with fractions by cutting the pies into slices and talking about ratios. If you want to add a little extra, you can find a pi shaped pizza cutter, a pi-shaped pie plate, or fun plates with crazy fractions that actually say, “I ate some pie.”

See a fun pie recipe below!


If you don’t want to use the actual pies for measuring, you can have fun decorating paper plates for this Pi Day activity. All you need are some basic paper plates and fun colored papers. Cutting the plates into various sizes to play with fractions could really be fun. Hooray for math!

Paper Chain

The university I graduated from would celebrate Pi Day each year by giving a free piece of pie to anyone who came and added a paper “link” to the Pi chain that stretched all through the building. You could start this same tradition! Assign a paper color to each number and link digit after digit, and add one link for each digit. It can make a fun decoration!


Inundate your kids with math jokes and puns! There are SO many to find online. I bet you they laugh from at least one (just don’t count how many your kids groan at). Just search “funny math jokes for kids.” Note, the “for kids” is important. There are more than a few inappropriate math puns out there.


A necklace or bracelet is a cute Pi Day activitiy to show off the digits of Pi (3.14159 are the digits of an infinitely long number, and would probably be the best starting place for a bracelet). Have your child string 3 beads of one color, followed by 1 of another, then 4, 1, and so on. You can also just assign a color to each number and do one bead per digit. Pipe cleaners are a good “string” for young kids and bracelets, and yarn or other string is better for necklaces.


This Pi Day activity can be turned into a pretty neat art project. Each building in the skyline represents a number in the Pi sequence. Three blocks, one block, four blocks, etc. It’s a project that can go different ways. You can use lots of colors for the buildings to make it super bright and fun, or you can use black for the buildings and do a sunset/sunrise behind them for beauty! You can challenge your kids to make a crazy long skyline – remember, Pi is infinitely long!


I found a fun series of books when I did a search for Pi Day activities. The Sir Cumference series is full of math puns and cheesy adventures. I love it! The best one for Pi Day is Sir Cumference and the Dragon of Pi. Sure, the names of the characters are all math puns and the premise is a little cheesy, but I enjoyed reading it with my kids. We are looking forward to reading more of these books. You can find some of the series at our local libraries (but not the Pi one, unfortunately).

Key Lime Mousse Pie
For the Crust
  1. 1 1/4 Cup Graham Cracker Crumbs
  2. 6 Tablespoons Butter, melted
  3. 1/3 Cup Shredded Sweetened Coconut
  4. 1/4 Cup Slivered Almonds, chopped
  5. 2 Tablespoons Sugar
For the Filling
  1. 1 Can (14 oz.) Sweetened Condensed Milk
  2. 1 Can (6 oz.) Frozen Limeade, thawed
  3. 1 teaspoon Key Lime Zest
  4. 2 Tablespoons Key Lime Juice
  5. Green Food Coloring (optional)
  6. 1 Container (8 oz.) Frozen Whipped Topping, thawed
For the Crust
  1. 1. Preheat oven to 350°F. In a medium bowl, combine all crust ingredients and stir until well combined. Press Firmly into bottom and sides of a 9-inch pie plate.
  2. 2. Bake Crust until lightly browned, 10-12 minutes. Remove from oven and cool completely.
For the Filling
  1. 1. In a large bowl, combine condensed milk and limeade. Stir until well combined. Add zest and a few drops of food coloring, if using. Stir until well combined. Fold in whipped topping. Blend until smooth.
  2. 2. Spoon filling into cooled piecrust. Freeze until firm, at least 2 hours or overnight. Cover well once filling is firm.
  3. 3. Just before serving, you can garnish the pie with extra lime zest, candied lime peel, toasted coconut.
  1. -If you can't find Key Limes, regular limes work just as well. The pie will be just a notch down on the tart scale (but still delicious!). I actually use regular limes more often then Key Limes.
  2. -If you're using fresh limes, be sure to zest first, then juice.
  3. -Do lemon instead of lime.
  4. -It can easily be modified for individual pies, 9x13 pan for bars, or even parfaits.
Fargo Mom

Looking for more fun for March? Check out our Guide to March Events!

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Dani Tanner (not THAT Danny Tanner) is a Twin Cities native who has lived in South Dakota, Iowa, South Dakota again and now Moorhead. She married her husband Greg in 2009. Dani received her bachelor's degree in Consumer Affairs in 2013. She has chosen to stay home while supporting her husband through graduate school (and now as a professor!) and chasing their five kiddos! She has a few hobbies - cooking, baking, sewing, reading, crafting... though they never seem to be fully realized. Not while there are still kids at home anyway! She enjoys all things in the kitchen and loves trying new recipes and techniques. The current new thing? Cake decorating! Various craft endeavors take some other time, as well as reading when she takes the time. Oh, and coffee. All the coffee. If you want to find her, she's likely that mom pushing a double stroller with three kids on it trying to get wherever she's going before someone freaks out. She's so glad to be able to share some of her fun experiences with you!


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