There is wisdom here. Thanks for your insight. As the giver of a gift recognizing the importance of the need for the receiver to value the gift, I might have said something like…my dear children, you know how I use my art for both self expression and as expressions of my love. I’m giving you this art which was created with the love you have given me since your birth in mind in an effort to return that love so you will always have a part of me with you, even after I’m gone, and hope you will think of me and how much I love you each time you see it.
As the receiver of the art I hope I would recognize the love and effort that went into the creation of the art, take at face value the words and sentiments of the artist and let those thoughts and feelings outweigh any discomfort about the religious context of the art.