French gaming site Le Mag Jeux Video got pictures of what appear to be the official premiums for The Legend of Zelda: Ocarina of Time 3D; it includes a wooden (or wood-patterned) pen and a plastic ocarina with the holes identified by their note. I had no idea an ocarina looked like a blue athletic cup.
The site had no information on what products will include these premiums, how you get them, or if they're available in Europe or all regions. Just the claim they're official. The bag in which they were packaged said it was imported by a German company. The instructions are in english.
More images at the link.
Goodies Collector: An Ocarina and a Pen for Zelda OOT 3D [Le Mag Jeux Video]