You can make lots of things from granny squares, I’ve also presented giant granny squares for the floor before.
But you can also make veeery small granny squares and connect to a granny squares bookmark ;-)
Links:
Granny Squares Bookmark (Knitting and Crocheting Projects – 24 of 24 – Granny Squares)
Here at unikatissima:
Giant Granny Squares
Entries containing the word ‘crochet medaillon’