nice one ;-)
For details, please visit creative commons. For me its almost impossible to understand this "special court language" in my mother tongue - so no chance that I will try to explain in english ;-)
But in rough - you can modify the object to your liking. You even can redistribute this object, as long as you carry on the creative commons license, which means someone else could modify your modification and redistribute. The original authors have to be named and the same creative commons license has to be used.