To provide a set of an aroma and a jigsaw puzzle for measuring a life age, and recovering and improving a brain function.SOLUTION: A color of a pattern of a jigsaw puzzle and the pattern of a mount for use in assembly of the jigsaw puzzle is changed intentionally. As a result, mutual relationship is present between the assembly time and the life age, and at the same time, it is found that mental bad conditions and repeated stress have an effect on the assembly time. Accordingly, it can be assumed to be effective for recovering and improving the brain function to keep some kind of intelligent relevance on the pattern of the jigsaw puzzle and the mount for use in the assembly of the jigsaw puzzle.SELECTED DRAWING: Figure 1
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