Ayala Art is running a daily art challenge for July called 31 Hearts. I found out about this on the forum for 7 Card Draw, an Etsy team I belong to. If you want to participate too (you don't have to post one every day), go to Ayala Art and click on 31 Hearts.
Anyway, here is my first entry, an ACEO I did back in 2009.
I hope you can see the heart shape formed by the swans heads and necks. This ACEO is for sale on Etsy here.