What island group is located off the coast of flordia and north of cuba?

The Bahamas .
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Explanation:  The Bahamas is the only island group; or, "group of islands" that appear
 that appears north of Cuba and off the coast of Cuba. 

Refer to the attached image, within in the box outlined in red, to see the location of the Bahamas (group of islands), in respect to Florida (state in the United States of America) and in respect to Cuba.

This is all you, but i can give you some topics that you could try. if it rained when you want to do something outdoors, it 'limits' that human activity. maybe you want to do an experiment that goes throughout the whole year and you have to have above freezing the entire year. this 'limits' your activity. i thought of those just off of the top of my head. something that gets to me that might be getting to you is you are thinking too hard about what to do. think simply, and if it is too simple, then bump it up just a little bit.