How to Step Through an Index Card

How to Step Through an Index Card

Squeeze your entire body through an index card!

What if we told you that you can fit a quarter through a dime-sized hole in an index card? Would you believe it was possible? It is possible, and we can even show you how to fit your entire body through an index card. Don’t believe us? Try it for yourself!

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Experiment Materials

  • Notecard
  • Scissors
  • Adult Supervision

Experiment Videos

Experiment

1

Fold the notecard in half the long way.

How to Step Through an Index Card - Step

2

Use the scissors to make a cut about 1 cm from one end of the notecard.  The cut should start at the fold and end just before the edge of the notecard. Be careful not to cut all the way through!

3

Repeat step 2 on the other end of the notecard.

4

Unfold the notecard.  Use the scissors to cut along the crease of the large middle section.  Do NOT cut through the slits on each end that you created in the previous steps.

5

Fold the notecard once again.

 

6

Start on one end of the notecard. Make a cut about 1 cm away from your first cut. Start on one side and go almost to the edge on the other side but do not go all the way through.

7

Make another cut about 1 cm away from your cut in step 6.  This time, however, start your cut from the opposite side of the card. Again, go almost to the edge on the opposite side.

How to Step Through an Index Card - Step 8

8

Continue moving along the card making cuts about 1 cm apart.  Each time, alternate which side you start the cut from and do not cut all the way to the other side.

How to Step Through an Index Card

9

Once you have cut to the other end of the card, carefully unfold the notecard and gently pull it open.

How to Step Through an Index Card - Step 9

10

You should have a giant ring which you can step through and maybe even squeeze your entire body through!

How Does It Work

Although an index card seems small, the surface area of a little 3in. x 5in. index card is 15 square inches. By carefully cutting the index card in the pattern above, you are redistributing the entire surface area across the length of the ring, all while keeping the surface area connected.  The closer together you make your cuts, the longer the ring will be.  The surface area of the card never changes, so the width of the ring directly impacts the length.