Mary, there are so many blocks in the quilting world, it can be really hard to choose. I suggest something really easy like an Irish chain or 9 patch.
Many people make an I Spy quilt for little ones from colorful print scraps. That would be big squares or rectangles with sashing in between.
The easiest may be Rail Fence. It depends on how many colors you want to use.
Quilt magazine and Quick Quilts are probably the best bets for the beginning quilter because their instructions are really good, and the patterns are simpler. You can pick them up at Walmart and many other places.
Lastly, I started quilting with a book called Your First Quilt Book by Carol Doak. It has a few simple pattern to get started with. Not overwhelming.
Good Luck!