I've been making scrappy string blocks for my current scrappy quilt project. These blocks are 10" square and I'm using full size paper towels as my foundation. These are lots of fun to sew and super easy. I love the border that is made with the center white strip. I'm going to make 49 of these for this quilt top.
You can make string blocks in any size and there are lots of different ways to make scrappy string blocks. I found several examples when I did a simple google search. There are also a lot of examples on Pinterest.
Here are a few links:
pieced center string block tutorial
Bonnie Hunter's String Block Tutorial
MSQC String Block Video Tutorial
String Block Tutorial