Despite the intense interest in humanoid robots, the first robots to enter everyday homes may look more like ducks.

Hugging Face’s Microduck went on sale Thursday and saw strong demand on its first day. Priced at $399, the compact robot walks on two small legs and has a rotating head resembling WALL-E from the Pixar film.

Microduck runs on open-source software, although its hardware design remains proprietary. Using reinforcement learning in computer simulations, it can learn new skills such as roller-skating and playing miniature soccer.

Nvidia announced last week that it would acquire Hugging Face for $12.9 billion. CEO Jensen Huang has repeatedly described robotics as the next major frontier in artificial intelligence following large language models.

Meanwhile, a home robot unveiled by 1X Technologies last October has received more than 10,000 preorders but has yet to be delivered. SoftBank is reportedly in talks to acquire a majority stake in 1X at a valuation of approximately $6 billion.