Step 3: Spin It!
Tape the animation down so it stays put.
Spin it in a mirror. It only works if you look through the shutter slits.
If you made a smaller, lightweight phenakistoscope, then a thumbtack in a pencil eraser is better than jamming a pencil through the center hole.
Note: After 5+ hours of fixing, checking, and minor corrections you may feel a tad sea sick!