Hi Pinkflowers, I just sew my I Spy squares together the simplest way... like in the photo below. If you want to try some pretty patterns for I Spys, Bonnie Hunter has two free patterns on her Quiltville blog.
http://quiltville.blogspot.com/p/free-patterns.html
Scroll down to find "I Spy a Four Patch" and "Storytime Stars".