You quilt each block and when they are all done and dusted you make strips that you machine sew on one side and hand sew on the other side of another block back and front. Lots of examples of QAYG on Youtube as it is hard to describe in words.
And speaking of which- a sampler quilt would be a great place to start on Leah Day's quilting site. She will give you a pattern a day (or week) to do machine quilting that you can apply to each of your blocks. Have fun!