It's just an envelope with his name on it. In the envelope is a plain silver card and inside the card is:
A photo of Henry playing with the critters, fighting over an enamel pin shaped like half a heart. Nick might be able to see that in the photo it has the word "Best" engraved on the front.
The matching pin, the other half of the heart, is pierced through the back of the card. It, of course, reads "Also Best". Underneath, he wrote a quick: Happy Holidays, -Henry
ยป delivery.