A four-legged board with a round opening about 19 cm in the center with a plate-like recess in front. When the children were already able to stand on their feet, they were put in this walker to prevent them from falling. They put clothes under their feet so they wouldn't stand on the ground. Food (e.g. pasta) was placed in the recess next to the hole, from where the child could eat it.
It is a widespread furniture throughout Europe, with Its first depiction from Pieter Brueghel (Children's Games (1580)), where it is shown in a peasant setting, but it was also used in upper-class homes until the 17th century. In the 19th-20th century the peasantry had all the important variants of it.