Making an Arrow Optical Illusion Materials ● Four pipe cleaners ➤ Two the same colour ➤ Two different colours


● Scissors Method 1. Take two pipe cleaners that are the same length and same colour.


2. Now, cut in half the other two pipe cleaners that are a different colour. You will use these different coloured pipe cleaners to make the end of your arrows.


3. Wrap the middle of one short pipe cleaner around the edge of one pipe cleaner. 4. Then bend the short one in half so it looks like an arrow. 5. Repeat this process on the other side.


Now take your completed pipe cleaners and hold them up side by side. Then slowly move your pipe cleaners apart. Which one is longer?


Result: What happens? One arrow appears longer than the other. Because … Your eyes play tricks on you.


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