Step 1: You Will Need
7 strings/threads (your choice of colour)
Step 2: Octagon
Draw a fairly accurate octagon on the card (8 sided shape). And cut it out, then put a small slit in each side and a hole in the middle.
Step 3: Tie a Knot
Tie a knot in all the strings so they are attached.
Step 4: Setting Up
Push the knot through the hole and push each thread through each slit.
Step 5: The Longest Step ;)
Hold the card so the empty slit is at the bottom then count three slits anticlockwise and pull that thread out of it's slit and into the empty one, then repeat this stage. Remember to check the lose threads are not tangled. And keep it tight.
Step 6: Done
Pull threads off the slits when it is the right size and pull through, cut off, and tie the knot!!!