My package arrived covered in various geeky/reddit related references. Upon opening, a note stated:

Here's the game. One of the pictures on the outside will give you a clue to what # box has the gifts.

Upon inspection of the outer box, I decided that the hand-drawn tri-force meant that I should check box number 3. I opened it, and found a gift set of tea from Teavana! I was rather pleased with myself till I opened it and found it to be empty.

Slightly stumped, I shook the other boxes to see if that gave any hints to the contents. Box 4 sounded like it was full of plastic forks, so I decided to crack open box 2, finding a tea steeper. Awesome! Box 1 had similar contents, but instead of the standard ball, the steeper was shaped like a tiny metal robot!

Box 5, I surmised, must have the tea. Indeed it did - I got White Chocolate Peppermint, Pumpkin Spice Brulee, Spiced Apple Cider, and Orange Chocolate Sweet Spice teas.

Turns out the Optimus Prime on the top of the box should have been my clue - the gifts were in the prime numbered boxes.

Box 4 did in fact contain a bunch of plastic forks. Joke's on my gifter, I'd just run out of them at work.