So sorry for your loss. Stay close to loved ones and friends. Not sure I would add anything to the cross, I like its simplicity. Did your son have a fav sport or activity? Perhaps add details of something that brought him joy in life. Take care.
Cool tattoo. A nice rendition of one of the squashed fairies from I believe the book "Lady Cottington's Fairy Album". I am surprised how few people have picked up on the fairies from this and its companion book.