This video introduce the concept of comparing weight, kids can learn how to use balance scale, it is...

Due to Youtube decrease the income for kid's video, we are greatly affected. We have launched patreo...

Due to Youtube decrease the income for kid's video, we are greatly affected. We have launched patreo...

Due to Youtube decrease the income for kid's video, we are greatly affected. We have launched patreo...

Due to Youtube decrease the income for kid's video, we are greatly affected. We have launched patreo...

Due to Youtube decrease the income for kid's video, we are greatly affected. We have launched patreo...

Due to Youtube decrease the income for kid's video, we are greatly affected. We have launched patreo...

Due to Youtube decrease the income for kid's video, we are greatly affected. We have launched patreo...

Due to Youtube decrease the income for kid's video, we are greatly affected. We have launched patreo...

Due to Youtube decrease the income for kid's video, we are greatly affected. We have launched patreo...