I used this Post stamp shaped RD stamp from Vintage Birds with black pigmented ink from Clearsnap and then heat embossed it with clear embossing powder. On the top two windows I stamped some flowers from RD Bold and Beautiful set as the background.
The next step was to paint all small chipboard pieces with ESF paint( Ann Butler's Iridescents Lilac, Lipstick and Aquamarine) and to glue them into the windows.
The keys (to the hearts or maybe just to the new card/house or whatever) were heat embossed into gold.
The Little Birdue told me... sentiment from the same Vintage Birds set was added over the frame to tell that this piece is " something about". Again, it can be given to the new engaged couple, to those who just got a new house or just because...