Take a suitable box. Remove any stickers. Take acrylic paints and paint over it. Write a heartwarming message “for my…” and decorate it with glitter or sprinkles.
Print out your favorite pictures together and glue them on the front inside of the box.
Attach an envelope which will have a personal letter inside.
Tie a decorative string with a cute message on it so it will appear when you open the box.
You can line the inside with tissue paper, put some of his favorite chocolates and battery powered lights. You can also write some love coupons.