In the museum there was a invention that when you spin it looks like the bird in the cage. There was two small poles. There was stings attached to each side of the poles. In the middle there is a flat wooden circle. In one side of the circle is a picture of a bird and the other side a picture of an empty cage. When you turn it around many times then let go and looks like the bird is in the cage.

In the museums there was also a cylinder that was empty in the middle. in the sides in the inside there were pictures of the same thing  or person. In between the pictures there is a rectangular hole to give the person watching it like its moving. The cylinder its on a pole that holds and spins. When you spin the cylinder you look through the sides to see it move

In the museum there is a machine that when you look inside are pictures. The pictures are like stop motion. On the outside there was a handle that you turn. When you turn the pictures insides move and if yo turn it fast it looks likes its moving.