I'm new to diamond painting, and these are perfect for beginners.
There were two things about Marcy that I changed: Her eyes looked really freaky to us with beads on them, so I removed the beads and used a white marker to hide the bead numbers. The result was flat white , just like in the cartoon, and she looks much better (at least in my opinion); after all, the white ovals are not her eyes, but are glasses. The white streak in her hair also looked "off", even though she is often drawn that way, so I replaced the two white beads with three black ones.
I do not want to stick these on anything that would be carried around; I'd much prefer to have them as magnets on my fridge. I'm thinking that this might be possible, if I stick them onto some stiff card stock or thin cardboard, trim around them, and attach peel-and-stick magnets to the backs.