How can we explain to our kids what the measure concept is?

As we already know, there are lots of mathematic concepts that are difficult to understand for the kids, and, there are some cases in which adults have some doubts about which is the best way to explain them. This could be happen with the meauserement concept.
As a good solution, from my personal point of view at least, we are lucky to get lots of resources that we could be helpful for us in internet.
It´s ok if you don´t find the best way to explain the measure to your learners, there are lot of tool that can be useful and teach you some methods that maybe you didn´t know it before.
Teachers are learners their own life.

Here you  have very interesting and great videos for your kids explaing the measure concept! We live in a technological era so, what better that these resources for your lessons?