To start things off:

Bluetooth transmitter: Neat little gadget that you plug into your TV and then transmits audio via Bluetooth. The fancier models broadcast two channels - so two people can listen simultaneously. Great for parents with sleeping kids to get some TV time.

Microfiber glasses cleaning cloth: If your recipient wears glasses, they’ll have a few of these already. But they’re boring. You can get them with nice pictures (My wife has Starry Night by Vincent Van Gough on hers), or you can even get them with custom photos, but that costs a lot more.

I’ll add to this as I think of more. 😃