My crumb squares are 6 inches but any size will work. You need 4 crumb squares for each Magic Crumb Block
(These measurements assume you are using 6 inch crumb squares)
The contrasting fabric is cut in 4 1/2 inches strips.
For each Magic Crumb block you need:
2 patches that are 4.5 inches by 6 inches
1 strip 4.5 inches by 14.5 inches.
Don't use any crumb block that has the same color on the edge as your contrasting fabric (in the middle seems fine).
Sew them together so they look like this:
Rotate the mat and cut through the middle again. Now your block is in four pieces
Rotate the top left corner and bottom right corner 180 degrees so it looks like this:
Sew the block back together.
That's it! Easy huh. I am thinking this setting would be great for an I Spy Quilt too.