This is Ducksie. When standing, he is a very confident little guy. Come close, and he may run away in his own, very special, way.

If you tilt Ducksie 45 degrees, there is a small wheel with a mechanisim inside. When you drive Ducksie around, the head will animate forward and back, and a little up and down. It drives best on areas that are not too smooth.

Many other fun designs can be found on my Cults3D profile:
https://cults3d.com/en/users/kthuen/creations

This model is a print-in-place, which means that there is only 1 part and no assembly. It only takes a few hours to print. It may be a great way to test your printer or filament. It has all the classic print test properties: Wild overhangs, steep curves, very small details and moving parts. Maybe it also works as a great showcase on what makes 3D prints so versatile and fun.

The model requires no supports set up in the slicer, but after printing you will need to remove some built-in, very small support structures. Here is how to handle them: Start by cutting off the small supports below the wheel. Then turn the whell a bit, and polish it to be perfetly round on the area where the support was. When the wheel is turning perfectly, turn it to the position where the full neck is visible. Now you can carefully cut away the supports that is on the left and right side of the neck, just below the head. This may be the tricky part.

It should be an easy print if you have PLA of a good quality and your printer is perfectly set up. While testing the print, I had problems with some filaments, but I think enabling "Z hop when retracted" did the trick. A gluestick is also a really good help, as the bottom area is quite small.

https://www.youtube.com/watch?v=E-voKnizqjM

UPDATE 1: There is a new version "Ducksie_EasyWheel.stl". This version does not require a knife for the freeing the wheel. Instead the support is a small piece that is easy to break off. I should note that this version also includes my initials at the bottom. You do still need a knife for removing the support at the head.

UPDATE 2: See the short How-to video here: https://www.youtube.com/watch?v=YrsW_j8XM80

Have fun!

If you like Ducksie, you may also like Turt: https://cults3d.com/en/3d-model/art/turt-mechanical-toy