First off, congratulations on the gift! That is awesome.
Here's my picks for $50 (approximately):
Monarch shirt + Invisible Deck (or a deck of cards)
or
Overstuft + Invisible Deck (or a deck of cards)
or
Break
or
I don't have Chaos, or Torn & Restored Transpo. But they add up to roughly $50 and both look amazing.
or
The Code (which is awesome), and two decks of cards (or $20 in downloads) (or Invisible Deck).
or
I could do this all day. Basically, find things that set your imagination on fire, and order those.
And have an amazing rest of your holiday!