As part of our Science unit on Light, we learnt about shadows.  

We learnt that shadows are formed when an opaque object blocks a ray of light.  We aimed to show that a shadow can change size depending on the distance the object casting it is from the light source.  Shadows can also be elongated or shortened depending on the angle of the light source.  We wanted to show that a shadow is always the same shape as the object that casts it.  To do this, we created a shadow puppet show and showed how we could elongate and shorten the shadows.  Take a look at the images.