Perose, that is a lovely story - I am so delighted for you and your son. Last year I finally traced my biological father, sadly too late but I am now in close contact with my half sister and half brother, especially my half sister. When it was her birthday, I got her a little silver heart with SIS written on it, she can attach it to a bracelet if she wants to, or just keep it. I think the watch idea is lovely, even if he has one - it will be because it is from you that it will be so special. Alternatively, something with 'son' on as a keepsake - it's not fashionable but the sentiment will be perfect.