Hi, I thought you may like this Mentalrobics exercise from Braingle.com:
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Mental Smells

Close your eyes and try to recreate the following smells. This exercise helps improve your ability to form concrete impressions from memory.

1. A ripe orange
2. Hot chocolate
3. A rose
4. A skunk
5. Cigar smoke

How well did you do at recreating the smells?
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For more mind exercises: http://www.braingle.com/mind/