The image below is part of a piece of equipment found in the playground of a London primary school.

• What do you think it is used for?
• What is the shape of its base?
• How would you describe it to someone over the phone?
• Where was the sun, that created such strong shadows, in relation to the 3D structure?

Try to draw a picture of the whole structure from the information you have.

You might also like to make a model of it and shine a light onto it to reproduce all the shadows.