Make a familiar object using shapes. Use the language of shape, position and number while discussing with pupils how to make the picture. How many shapes is the house made up of? The rocket uses a rectangle - can you see anything in the classroom that is a rectangle shape? The rocket is going to fly to a planet - what shape would you use for that?
Make pictures from common shapes. Can pupils make shapes bigger and smaller to represent... a caterpillar's legs, windows on a house or bus, apples, etc? What shapes and sizes do they need to represent a block of flats, a house, a lorry? Can they make a face with shapes?