I absolutely love to start with a basic quilt block, fracture it into smaller pieces and then either make it scrappy, watercolor or gradient. At first I was intimidated by how they were done, but it can be easy and fun.
Take this "Corn and Beans" block with only 2 color or value groups. Divide the 2 squares into half square triangles, then each unit into thirds. You will have a fractured corn and beans block.
Next you choose lots of different fabrics within each color or value group and you get a great new quilt block. You can make it scrappy, or watercolor style or color gradient. Use jelly rolls (2½ inch strips) and this block measures 18 inches square or nickels (5 inch squares) and you'll have a 37½ inch block.