Cut a ¾-inch wide strip of craft foam long enough to go around your wrist. Mark 4 equally-spaced points along the length of the band.
Add 2 more points one beside the 2nd and the other beside the 3rd points. Use the tip of a pencil to punch a hole through each marked point.
Cut a length of string at least 4 inches longer than your craft foam band. Make a knot on one end. Lightly singe the opposite end of the string.
Insert the string through the first hole on the band. Pull all the way through until the knot touches the band. String the first button, weaving in through one buttonhole and out through another.
String more buttons until you reach the last hole on the band. Make a looped knot at the back of the band. Cut the excess length of string. Enjoy!