How to Make a Ninja Star

Remove the cap and plastic ring from a plastic bottle., Turn the plastic ring inside-out., Slip the cap into the ring., Readjust the spikes as needed., Admire your work.

5 Steps 3 min read Medium

Step-by-Step Guide

  1. Step 1: Remove the cap and plastic ring from a plastic bottle.

    The cap will form the base of your ninja star and the ring that the cap was previously attached to will form the points of the star.

    Choose a plastic bottle with a plastic cap connected to a plastic ring.

    Sports drink bottles work best because they have the largest openings and, as such, have the largest caps.

    You could also use water bottles, tea bottles, or pop bottles.

    Twist the cap off as usually, breaking it from the attached plastic ring in the process.

    It may take a little effort to get the plastic ring off since they are not meant to come off easily.

    Dig your nails beneath one side of the ring and pull upward as far as you can.

    Switch to the opposite side and do the same.

    The ring should lift a little higher the second time.

    Continue wriggling the ring up in this manner until it passes over the threads and off the bottle completely.
  2. Step 2: Turn the plastic ring inside-out.

    Use your fingers to flip the plastic ring so that all of the "spikes" or pointed grips face the outside.

    Push on the inside of the ring on one side using your thumb.

    Once you manage to flip the inside out in one spot, it should be easier to gradually ease the rest of the inside outward.

    Note that the pointed grips may "bite" or pinch into you slightly as you work.

    Typically speaking, though, the edges are not sharp enough to cause any cuts or wounds. , Wiggle the ring over the outside of the cap until it fits snug around the center of the cap's perimeter.

    Rest the ring on the top of the cap, aligning the opening of the ring with the top of the cap as accurately as possible.

    Use your thumb to push down on one side of the ring until it slips over the edge of the cap.

    Gradually ease your thumb around the perimeter of the ring to slide the rest of it onto the cap.

    Once on, ease the ring to the center of the cap by sliding it down with your thumb and forefinger. , All the spikes on the ring should stick out.

    Carefully run your thumb along the spikes in the opposite direction of the spikes.

    Doing so should lift the spikes nearly straight up.

    Note that you may scratch your thumb in the process of doing this. , Your ninja star is now complete.

    Do not throw this ninja star at animals or people.

    It is not a particularly dangerous version, but you can still cause damage if you throw this at an animal or human.
  3. Step 3: Slip the cap into the ring.

  4. Step 4: Readjust the spikes as needed.

  5. Step 5: Admire your work.

Detailed Guide

The cap will form the base of your ninja star and the ring that the cap was previously attached to will form the points of the star.

Choose a plastic bottle with a plastic cap connected to a plastic ring.

Sports drink bottles work best because they have the largest openings and, as such, have the largest caps.

You could also use water bottles, tea bottles, or pop bottles.

Twist the cap off as usually, breaking it from the attached plastic ring in the process.

It may take a little effort to get the plastic ring off since they are not meant to come off easily.

Dig your nails beneath one side of the ring and pull upward as far as you can.

Switch to the opposite side and do the same.

The ring should lift a little higher the second time.

Continue wriggling the ring up in this manner until it passes over the threads and off the bottle completely.

Use your fingers to flip the plastic ring so that all of the "spikes" or pointed grips face the outside.

Push on the inside of the ring on one side using your thumb.

Once you manage to flip the inside out in one spot, it should be easier to gradually ease the rest of the inside outward.

Note that the pointed grips may "bite" or pinch into you slightly as you work.

Typically speaking, though, the edges are not sharp enough to cause any cuts or wounds. , Wiggle the ring over the outside of the cap until it fits snug around the center of the cap's perimeter.

Rest the ring on the top of the cap, aligning the opening of the ring with the top of the cap as accurately as possible.

Use your thumb to push down on one side of the ring until it slips over the edge of the cap.

Gradually ease your thumb around the perimeter of the ring to slide the rest of it onto the cap.

Once on, ease the ring to the center of the cap by sliding it down with your thumb and forefinger. , All the spikes on the ring should stick out.

Carefully run your thumb along the spikes in the opposite direction of the spikes.

Doing so should lift the spikes nearly straight up.

Note that you may scratch your thumb in the process of doing this. , Your ninja star is now complete.

Do not throw this ninja star at animals or people.

It is not a particularly dangerous version, but you can still cause damage if you throw this at an animal or human.

About the Author

D

Daniel Stokes

Experienced content creator specializing in cooking guides and tutorials.

52 articles
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