My hobby is quilting, which involves sewing layers of fabric together to make a material that is padded and thicker. 
How did you learn to do that? I bet they are beautiful.
My mom taught me. I have made bed spreads and various wall hangings over the years. 
How much time does it take for you to make them?
It can take months when I'm doing the quilting by hand. You can also use a sewing machine, which is much faster!
I bet it is very time consuming.  Does it take a special type of sewing machine?
and several rollers on which the fabric layers and batting are attached.
Quilting using a longarm machine can take significantly less time than hand quilting or more traditional machine quilting. This time saving is a large factor in the gain in popularity of longarm quilting.
History.
The advent of the sewing machine led to an idea known as a “quilting machine,” which made its debut in 1871.
The first quilting frame and machine consisted only of two bars that allowed the user to move the quilt and the
Quilting
Quilting is the process of sewing two or more layers of fabric together to make a thicker padded material, usually to create a quilt or quilted garment. Typically, quilting is done with three layers: the top fabric or quilt top, batting or insulating material and backing material, but many different styles are adopted.
The process of quilting uses a needle and thread to join two or more layers of material to make a quilt. The quilter's hand or sewing machine passes the needle and thread through all layers