Put your ballet slipper on your foot.
Hold both strings in your hands and pull or push the strings in each one of your corresponding hands.
Point your feet and flex your feet adjusting your strings so that it is comfortable enough to allow flexibility, but still support of each flex and point position.
Tie the strings together in a single knot, when your feet are most comfortable with the level of support after flexing and pointing
Pull both strings up and try to wedge the knot inside the crevices of the ballet slipper
Tie the the remaining string in a bow.
Tuck each side of the bow in your ballet slipper and ensure that you are still comfortable flexing and pointing your toe, even with the bows tucked inside your ballet shoe.