"Cardinal Number" - Children's Understanding of Numerosity [Research Toy]
Last updated on March 8, 2017 - 8:16am
![](https://livinglab.org/sites/default/files/styles/272_grid8/public/cardinal%20number%20toy.png?itok=n3wDyDJk)
This activity explores when children come to understand that the amount of things represented in a set are associated with a particular number word - a concept known as the "cardinal number principle".