Normally, I'm a reader, not a writer because there are many times where there are plenty of suggestions to help someone out. Since there aren't very many, here are my suggestions:
a nine patch- if want more sparkle, add bright colors to either the sashings, or into the 9 patch itself,
a disappearing 9 patch,
as a patchwork border around panels or along edges of actual quilts,
an irish chain (using 3" squares instead of the normal size),
or applique letters of the alphabet or numbers or I spy items to the squares and make kids quilts.
Hopefully you will find plenty of suggestions that give you an aha moment. Good luck.