Step 11: Assemble
bend upwards in a 90 degree angle, then remove the ruler, continue bending the card until both halves meet.
Next get your first 10 segment wheel and line it up inside of the card where the center hole of the wheel lines up with the leftmost hole in the card, and run a paper fastener through it, repeat for the second 10 segment wheel for the middle hole, and the 8 segment wheel on the rightmost hole.
Once all the wheels and fasteners are in place use your wire cutters to trim the ends of the fasteners down to about 1/4 inch long, then bend them down.
Make sure they are fairly tight, but not so tight that the wheels will not move, and enjoy!