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

It is very important that people be challenged by a project if they want to have a high likelihood of coming up with creative solutions. Without a challenge, the process is no longer rewarding and the incentive to innovate is not there. If you find yourself in a situation where a project seems too easy, try to find some way to spice it up. Maybe you could find a new way to do it that makes it challenging. Try to add some new element to the project that makes it interesting.
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For more mind exercises: http://www.braingle.com/mind/