| 摘要 |
This invention relates to an instructional device comprising a casing snugly enclosing a first central insert component and a second insert component. Each insert component has a combination of protruding fences, walled openings, and plain openings on a top and bottom surfaces. The first central insert component and the second central insert component is stacked together with the bottom surfaces of each central insert component communicating directly with each other resulting in the top surface of the first central insert component facing away from the top surface of the second central insert component. The stacking of the bottom surfaces with each other forms a series of internal enclosures and pathways while each top surface of the central insert components forms a series of external enclosures and pathways. The coordination of the internal and external enclosures and pathways forms several pathways permitting passage of an object from one top surface to the other top surface or through a middle compartment formed after stacking the first with the second central insert compartment. The object is the tool used to operate the device. A series of questions and answers are imprinted on each face and each pair of question and answer is contained in a cell. Correct and incorrect answers are given. The object is used to designate which answer is chosen by the user. Each answer has an opening leading to a definite pathway. All correct answers lead the object to the finish point while. incorrect answers make a user repeat or restart the operation.
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