You can go to
www.quilterscache.com
and pick out 12in blocks and do a sampler quilt. The ones with just one yellow dot are easy and by doing a sampler, you won't get bored making the same block over and over and think of all the new blocks you will learn!
Don't know about the colors, I would choose at least 3 :-o
Good luck1 I hope you make alot of money for your cause.
Ninnie