The lowest-priced brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable).Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag.See details for additional description.
A four year old child sits in front of a heap of wooden blocks and tries to stand them in a straight line in order of size. There is doubt that he understands the task, for he can distinguish between correct and incorrect solutions. Yet matter how he arranges and rearranges the blocks, they seem obstinately to refuse to be aligned into the desired staircase- like pattern. A year later he does much better: he can seriate six blocks differing in length by about an inch. But faced with eight of the blocks, or with six blocks differing by only half an inch, he is again unable to complete the task. He manages to build an ordered line, but leaves out one or two of the blocks: or perhaps he organises the blocks into two distinct lines and then finds himself unable to combine them. A year later still and he is w an accomplished performer. Presented with any seriation task involving the wooden blocks he carries it out smoothly, confidently, and correctly .