It rolls for thee. Did you know that the first LEGO toy, made in 1935, was made of wood, not plastic? Did you know it was not composed of wooden bricks but a single assembled piece? Did you know it was a duck? On wheels? It's a fact.
These days, the original LEGO wooden duck is a rare collectors item. Even the 2011 plastic brick reissue of the ur-duck is fetching hundreds on eBay.
Thanks to that photo and the conveniently countable lego bumps, I was able to create a decent simulation with parts from my LEGO Architecture Studio set (best gift ever from Prof M) and some wheels off the mini Mini Cooper that came with it as a bonus. The Architecture Studio set contains only white bricks so it's an albino duck. The eyes are the Mini's tail lights.
If you like your LEGO ducks more colorful, minimal and mass-produced, check out these LEGO duck producing robots made of LEGO bricks. Tres meta.