Have you ever seen the photo frames called 'Signature Frames'? They retail for around $29.95. They have a caption such as Christening or Thank-you and they come with a permenant marker pen. You and your DH can write a message on the frame from yourselves and Bub and put a picture in of everyone on the special day.

In another thread I also suggested plants as a gift. I just love the idea of something living as a gift.