Flipsticks

Our first activity in Year 5 Science Club was all about optical illusions and how our brain can be tricked into thinking that things are moving.

If we see a set of pictures very quickly one after another, our brain links the pictures together and they appear to be joined. We made a simple toy called a flipstick by drawing two pictures on either side of a piece of card, then attached a stick to the card. When the stick was twizzled rapidly, the pictures merged into one image.

Here are two pictures:

Here is what it looks like when the stick is twizzled

Here is another example

Then we looked at a curious optical illusion made by moving a set of patterned lines over a specially printed image:

https://www.youtube.com/watch?v=UW5bcsax78I

You can’t always believe what your eyes are seeing!