Like the other reply said, it is called a Balance Bike.
To add some more context, it is not a scooter because you aren’t supposed to stand up on them but sit like a real bike but you move by pushing with your feet. They are training bikes for toddlers before they have the hand-eye coordination for peddling and you can either graduate to a kids bicycle with training wheels or some kids just go straight to the bicycle without the training wheels.
The dandy horse, an English nickname for what was first called a Laufmaschine ("running machine" in German), then a vélocipède or draisienne (in French and then English), and then a pedestrian curricle or hobby-horse, or swiftwalker, is a human-powered vehicle that, being the first means of transport to make use of the two-wheeler principle, is regarded as the forerunner of the bicycle.