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I bought a set of these fraction tower cubes for my six year old daughter to try and help her visualise and explore the mathematical concepts she was learning on paper. The set says that it is suitable for ages 8+ but I feel that they are suitable for all ages providing the child is ready and willing to learn what can be a tricky concept to grasp. They are definitely not suitable for very small children who may choke on the smaller blocks.
The interlocking cubes themselves are manufactured from brightly coloured plastic and they are easily locked together and taken apart again and there are no sharp corners. They are very similar to the Unifix cubes used throughout Primary schools and they are also known as Equivalency cubes.
They are supplied in quite feeble packaging and I would definitely recommend storing them in a Tupperware box or something similar to keep all the bits together.
The set consists of proportionally sized blocks depending on the fraction it represents - this pack covers 1, 1/2, 1/3,1/4, 1/6, 1/8, 1/10 and 1/12 denominations. Each different fraction is colour coded so it is easy for a child to see that when four of the ¼ cubes are joined together the stick they have made is the same size as the whole and in addition to this the decimal equivalent is noted on each cube so children begin to associate the mathematical connections between fractions and decimals.
I found that these helped my daughter to picture the various relationships and combinations of fractions so in that respect it was money well spent - however I do feel the product is a bit on the expensive side for a few bits of cheap plastic.
Improve your fractions!