Thread your needle (double thread for strength) Make sure you have enough for a necklace. Tie one of the buttons with the loop on the bottom to the end of the necklace with a double knot.
Thread the buttons on like so : Up through one hole, down through the one across from it.
Once you have the desired look, tie the remaining "button with the loop on the bottom" to the end of your thread with a double knot.
Twist or tie around your neck and your ready to go! You can also make braclets, anklets, key chains, ect. using this same method. Or try threading the buttons through only one hole for a diferrent look. =D