Pi Play Mat

Created By:

Thomas Knauer

Skill Level: Intermediate
Patterns Available +/-
This is the Applique Pattern for the Pi Play Mat.

Thomas Knauer,, designed this quilt for his two children (ages 5yrs and 7 mos). Mostly the wee one needed a play mat he could take everywhere, but he loved the idea of having a quilt that Bee (the 5yo) could use to teach Babbit his numbers. The fact that she can use it to teach Babbit all about Pi (and how awesome non-repeating decimals are) just makes it even better. As a papa, he's always looking for more ways for play and learning to go hand in hand, so of course this had to carry over to his quilting.

Janome Supplies Required
  • Janome Sewing Machine - Thomas uses a Horizon Memory Craft 12000
Fabric and Notions Required
  • 1.5yds of 17” Pellon Wunder Under
  • Batting
  • Thread
  • Rotary cutter, cutting mat, scissors, pen, ruler
  • Number templates
  • Quilting motif file
  • Fabric:
    • 2 @ 10” squares of 8 different prints
    • 2 @ 10” squares of 8 different solids
    • 1.25 yds fabric for backing
    • 5 @ 2.25” x WOF for binding strips (use five different prints or solids)




  1. Print out the number templates and trace the needed numbers onto the paper side of the Wunder Under.
  2. Following the instructions on the Wunder Under, adhere one number to one of each of your fabric squares (one of each of the eight solids and one of each of the eight prints).
  3. Cut out each of your numbers following the lines you traced onto the paper side of the Wunder Under.
  4. Following the Wunder Under instruction, adhere the appliqué numbers to your remaining fabric squares. I made sure this was done in pairs (ie. if I placed a yellow number on a green floral background square, I would place the number that uses the green floral on that yellow background).

  5. Using your appliqué carefully stitch along the edge of each number. I use a straight stitch just inside the edge of the number, but you can use whatever appliqué stitch you prefer.

  6. Piece your squares together, making sure they all go in the proper order.

  7. Layer your quilt sandwich. For play mats like this I use Fusible fleece which is very lightweight and words great for quilts that don’t need to be warm. I fuse it to the quilt top and then use spray-baste to adhere the quilt back.
  8. Using an erasable/water soluble pen or pencil mark lines vertically and horizontally across the entire quilt. Start 3” in from the left and go across, and start 3” from the top and work your way down. The intersections will be where you center your quilt in the embroidery hoop for quilting.
  9. Starting from the middle of the quilt, center one of the intersections you’ve drawn in your 230 x 230mm embroidery hoop. Using the included quilting motif file, begin quilting your quilt. After each motif unit is complete, shift over to and adjacent intersection working outward to the edges.

  10. Use the binding strips you cut to bind your quilt. Make sure to properly remove all marks.

  11. Go play.

Everyone is Talking about Pi Play Mat

Wednesday, November 23, 2016

Around the Table Dresden Placemats
Saturday, December 17, 2016

I like the concept, but the directions are "sloppy." Nowhere in the supply list does it mention the felt or the batting (how much?). Also, I would never use a high loft batting in a placemat, or a table runner, as I think that it would be too unstable for a glass. The next time I make these, I will cut out the batting (I use flannel) and spray baste it to the wrong side of the Dresden plate before I put the Dresden plate on the felt to cut out. I have not yet washed the finished placemat, and am hoping that the single layer of felt does not curl up, or become distorted after washing/drying.
Fun Great Gift!
Tuesday, February 21, 2017

Teatime Quilted Tablecloth
Friday, February 24, 2017

I made this today but your cutting directions need to be changed. You only need 4 of color 1 and color 3 4.5 squares for the triangles. Also the inner border, you only need 2 cuts as WOF is long enough to cut each in half to fit the sides.
Great Machine
Wednesday, August 30, 2017

I've had this machine for only a week now. I bought it used from a lady who makes her own clothes, but she no longer needed the machine. During the purchase, she noted that she is almost sad that it's better to give it away because of how well the machine performed. (I also bought it along side a computerized machine of another brand.} She demoed the machine for us, showing it worked and gave us everything (including the box it came in!) She took amazing care of this machine. I have used it a few times now, and the directions for threading were easy to follow (albeit my hands are quite large so the lower looper was a pain, but that is no fault to the machine or brand.) And I recommend this machine to anyone who wants to learn to serge and wants a machine that can grow with them. I will happily use this machine time and time again.
S9 Review
Sunday, February 25, 2018

I love, love, love my S9! It's sews and embroiders beautifully and it's simplicity of use amazes me. I would recommend this machine for both a beginner and an experienced seamstress. If I would ask anything of Janome it would be to upgrade the programming to run a larger hoop size. I understand that it can't get much wider but there is most definitely room for it to go longer. That is the only limitation of this machine.
Monday, February 26, 2018

I purchased a Memorycraft 15000 a few years ago and it was the best purchase I ever made! This machine can do just about anything you would would ever want! I love the capability of using the Acuedit app to set up my embroidery pattern on my Ipad and then download it to the machine! I love how my embroidery looks upon completion and I love all the good lighting it has to light up your workspace. That way you don’t need to worry about where to set up your machine. It also has plenty of room to do machine embroidery on any size quilts! There are many decorative stitches from which to choose that are outstanding! It’s hard to choose which one to use! There are so many great features it is hard to decide what I love the most. If you want to buy only one machine to last a lifetime, I would recommend this one!
S9 Review
Sunday, February 24, 2019

The S9 is amazing. I learned to sew by hand when I was just 5 and in my grandmothers way as she was quilting. I took seeing classes in high school until they would no longer let me sign up. The S9 makes me appreciate my current skills as well as motivate me to want to learn more. This machine is awesome.
Horizon Memory Craft 15000
Thursday, November 19, 2020

My Janome Horizon Memory Craft 15000 is fantastic! I love, love, love this machine! When I came across the Eye for and Eye embroidery design today, I wanted to make it. However, the embroidery file is missing. Nothing downloads when I select the download button. Please help!
Treat Bag fun!
Monday, August 16, 2021

I made the Halloween treat bag for my new granddaughter and I’m sure it will last for years. No embroidery machine so I appliquéd the lettering. Need a little more skirt fabric for a better gathered look, and I used thin double-bias tape for the skirt hem, over edge stitch on skirt sides. I’m pleased with my results!
Very helpful tutorial
Wednesday, October 25, 2023

I want to say thank you for teaching me this method of applique. I was able to do it with a small letters. This method is the best so far from all of those I've seen and tried.
So useful
Thursday, November 30, 2023

I'd like to express my gratitude for teaching me this appliqué method. I successfully applied it with small letters, and, so far, it's the most effective among all the methods I've seen and tried.

The TWO Closest Dealers to you are:
2407 W 13th ST. , WICHITA KS, 67203
Find Additional Dealers