Cyberseams explains here how to knit pick up stitches. It is actually about joining sections together. You can use a knitting needle or stick for joining sections together. Take a piece of wool section which is already done. Now you are thinking to join it with new one. Insert the stick with one hole. Turn the new wool part and stick it together. Then do it again. Get the wool from back and bring it to the front. Be sure your seam is correct. After watching this video you can easily join parts of wool section and make creative things.