The principle is to write the invitation message on the engraved part of the CD, while the other part can be hidden by gluing a piece of colored cardboard cut to the diameter of the CD.
To write easily on a CD, you can use special felt-tip pens whose ink sticks to the plastic surface.
Then decorate with
stickers and mini-stickers. A loop is made with a scoubidou to suspend the CD like a mini-bag.