If you have young children in your home, it's wise to check if your window cords could present a problem. Tragically over 200 infants and young children have died since 1990 from strangling with window cords according to the U.S. Consumer Product Safety Commission.
You can prevent a strangling tragedy by retrofitting your blind cords to make them safe. Free retrofit kits are available from the Window Covering Safety Council. There are instructions with each kit plus videos demonstrating how to do the installation.