You`ll need about 5 feet of cord, a marble, scissors, and a lighter.
Step 2: Making it
Follow the steps until you get to step 3 then drop a marble in the center. Then start tightening it, don`t pull to hard when tightening. When you`re done tightening, then burn the ends of the leftover string together (as shown in 4th part). Then you`re done.