I Spy fabric is a novelty print with an all over design of something graphic. Like foods, animals, objects, etc. I Spy quilts are popular for babies and children as they can point out (or find) specific items.
Some prints that come to mind: strawberries, cherries, cats, dogs, zoo animals, noodles (yep, I have noodle fabric!), shoes, cupcakes, etc.
Can anyone else elaborate on novelty prints?