You have created a fantastic block!!! As others have said, the addition of the yellow is a good thing and the roses do look nice but your original plain block is also great on its own. Have you considered appliqueing a yellow rose? You might have a piece of fabric in your stash with a yellow rose on it that you could carefully cut and applique. I like the dimension of the roses you've added but depending on what she does with this block that will either be a good thing or maybe not. Whatever you decide, she will surely LOVE this block!