We are talking about Chana Sattu. Also known as Roasted Bengal Gram flour in English. It is considered part of the Chickpea family (currently popular as high nutrition plant based food globally). 
Eating in Sukhasana pose has many health benefits. Your kids and you should adopt it
Modernisation has not only brought in luxuries, ease and amenities but also changed our way of living. The basic example is- having meals on dinner table. Back then in ancient India like 20-30 years ago, people preferred sitting on the floor in crossed leg position and eat.