If you're a great-nephew of mine, you don't simply get that in an envelope though....that would be too ordinary.
Start with a pan, in this case a disposable loaf pan. Add a bit of water and freeze it. Place the cash in a freezer bag and place it over the ice.
Returning the block to dry pan, I wrapped it in gift wrap and off we went to the party. The birthday boy's mom knew I would need a spot in her freezer until gift opening time.
He thought it was odd that the gift was so cold but after unwrapping it, he could see the money inside.
The dark haired boy in the navy shirt has a birthday in two months. Time for me to start thinking of how to present his gift!