So here’s how we’re going to do it.

See that little gold present?  That wrapping isn't up on the "present key", so Thor won't know whose it is.
See that little gold present? That wrapping isn’t up on the “present key”, so Thor won’t know whose it is.

 

When all the other presents are opened, I'm going to give that one to him.
When all the other presents are opened, I’m going to give that one to him.

 

And here is what he will find inside.  It's a bit like opening a gift and finding car keys.
And here is what he will find inside. It’s a bit like opening a gift and finding car keys.

 

When he reads the dog tag, we’ll tell him to close his eyes, and then we’ll bring the puppy to him.  Hopefully, joy will abound.  And no one will pee on the floor in excitement.