Choose a theme for your mobile. You'll need at least four different shapes, or pictures. The mobile could be a school of fish, for example, or a circus full of animals, a sky full of stars and planets, or an underwater scene. Or use pictures or photos of your favourite team or pop group, for example, sticking each one onto a small piece of card.

Alternatively you could choose four simple shapes - like a triangle, circle, star or crescent.