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Here are two open spirals made from cuisenaire rods.
When you've done a lot of exploring you might like to try the something similar with numbers.
If you do, have a look at Number Spirals here.
These squares have been made from Cuisenaire rods. Can you describe the pattern? What would the next square look like?
Pick two rods of different colours. Given an unlimited supply of rods of each of the two colours, how can we work out what fraction the shorter rod is of the longer one?