Optical Illusion Trick

This fun and easy magic trick uses materials you may already have around your home.
Remember, it's always a good idea to practice at home first!

Suggested Materials:

* 1 x piece of standard office paper
* Felt-tip pen
* Ruler

Suggested Instructions:

Step 1: At home, use your ruler and felt-tip pen to draw 2 straight 10cm lines on your piece of paper. Your lines should be about 3 cm apart and one line should be directly below the other.

Step 2: Hold your lines up to your "audience" to show that your lines are exactly the same length.

Step 3: On each end of your top line, draw a basic V-shaped arrow head.

Step 4: On each end of your bottom line, draw a V-shaped arrow head in reverse.

Step 5: Show your lines to your "audience" again. Do they still look like they are the same length or does your bottom line now magically look longer than your top line?

Step 6: Choose a volunteer from your "audience" to measure your lines to prove that both lines are still exactly the same length. What an amazing optical illusion!

Step 7: At school, repeat Step 1 to Step 6.