Inside a larger box are three smaller boxes and a card. The card says "Open me first".
Happy Birthday Henry! Congrats on making 19 to the best nephew ever. (Don't tell your little brothers that) The two boxes wrapped in red paper can be opened with the family, but the box in black paper is for you to open when you're alone. I'll see you at the family celebration. Love, Uncle Colt
Larger red box, note attached, "I'll never tell anyone you've betrayed the Rockies. Just tell them I fucked up and you didn't want to embarrass me."
Smaller red box contains a hundred dollar gift card to Game Stop
Black box, note attached, "We'll never speak of this. Don't know or care if you need it now or not, but one day you will. Better safe than sorry." Inside is a box of 100 condoms and two smaller containers of lube