# Building with Cubes

Try to picture these buildings of cubes in your head. Can you make
them to check whether you had imagined them correctly?

A. Imagine you have five cubes. They are blue, red, yellow, black and orange:

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Now imagine making this building.

Start with the yellow cube.

Put the black cube just behind it.

Put the orange cube on top of the black cube.

Put the red cube on the left of the yellow cube.

Put the blue cube on the right of the black cube.

What does your building look like?

Try using cubes to check whether you had pictured it correctly.

Please draw or photograph your building and send it in to us.

B. Now imagine you have six cubes. They are orange, yellow, black, brown, pink and red:

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In your head, start with the red and the black cubes. Put the black cube underneath the red cube.

Put the orange cube on the right hand side of the black cube.

Put the yellow cube just in front of the orange cube.

Put the pink cube on the right of the yellow cube.

Put the brown cube on top of the pink cube.

What does your building look like?

Try using cubes to check whether you had pictured it correctly.

Once again, please draw or photograph your building and send it in to us.

If you've enjoyed this problem, you might like to have a go at More Buiding with Cubes.

As you picture each stage in your head, you might like to draw it
so that you can keep track of where the cubes are.

You could try to describe the building to someone else after each stage to see whether you can still imagine it.

You could try to describe the building to someone else after each stage to see whether you can still imagine it.

Alice from the Royal School did a sketch of the images she'd pictured in her head. Here are the two she sent us:

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Well done, Alice. I wonder if you can say which colour cube is hidden in each case?

A group of pupils from Lillington Primary School also sent us images of what they imagined the first building to look like:

This is from Abbie:

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This is from Chelsea:

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Here is Kyle's picture:

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And finally, from someone else, who's name I couldn't make out, unfortunately:

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### Why do this problem?

This problem is designed to encourage children to begin to visualise - in particular, to see an image in their head. There are two visualising aspects in this proble- imagining the act of adding a new cube, but also keeping in your head the picture of what is already there.

The activity will also help to familiarise your class with positional language (in front, behind, to the right of, to the left of, on top, underneath etc.).

Being able to visualise is a useful skill which children are often not used to drawing on. By explicitly talking about visualisation, and offering opportunities like this for your class to practise visualising, you will be encouraging children to use this skill in their independent problem solving.

### Possible approach

To introduce the activity, you might like to give each child just two or three cubes. Ask them all to close their eyes and slowly describe an arrangement of these cubes to them, inviting them to picture what they hear in their heads. Then, give them time to make the "building" with their cubes and compare their models with their neighbour's.

You could also invite a child to imagine their own arrangement of cubes and describe it to the rest of the class.

The larger the number of cubes, the harder it might become for children to draw their own "buildings", so a digital camera might prove useful. In fact, drawing any number of cubes in 3D is rather tricky! If they are used to using it, isometric paper would help.

### Key questions

Can you see those two cubes in your head?

What about the third one?

If it is under/behind/ on the right of that one, where will it be?

As you picture each stage in your head, can you to draw it so that you can keep track of where the cubes are?

Tell me about the building in your head.