First of all, you DO have more fabric than you need for a baby quilt! If you would like to use all of them, you could use squares or piano keys around a center of another block. How about a butterfly block? The fabric on the left looks blue; it could be the sky behind the butterflies, with the brightest pinks for their wings.
Another idea -- piece the blue and the matching pink print into one or more large 4-patch blocks, and scatter some bright pink flowers with white centers across them.