What if you used something like this with an adhesive backing? Maybe measure and trace out the shape you want then cut the diamond sheets accordingly and secure to the backside of reyonlds freezer paper (food safe). This would make it so that it could easily be taken off of the cake before serving. This way there is no chance of any of the parts getting in the cake, something food safe is on the back of it touching the cake but she still gets the effect she is looking for? Hope this helps.
Tiff - MA www.facebook.com/sweetbeecakery
