Even before the release of Super Mario Odyssey we’ve been seeing fan replicas of Cappy, and this 3D printed version with moving eyes may be the best one yet.
To make them move there’s a hidden strut connected to a small motor. An Adafruit Trinket controls the motor and a portable phone charger provides the power.
You’re looking at about 6 hours of print time for the eyes and $36 for the cap and electronics, if you use the same parts he did.
Even though the battery used was a bit too big, it can be hidden away. You can see the full effect of the finished project in the gif below which Jamison kindly sent us.