Kalmen Wewryk - the following are excerpts of his story To Sobibor and Back. An Eyewitness Account: 

I remember a certain transport from Holland - ach, this was horrible! There were too many Jewish children to be 'processed' rapidly so they were in a long, steadily shrinking circular line from morning to night. Such beautiful children, gorgeous little blonde girls with pigtails, decently dressed. These poor unfortunates were well-fed, with pretty, round little faces. Their parents must have loved them so, must have lavished such care on them, and now ... 

Many of them carried small suitcases or bags. It was pitiful, so sad! The SS men were watching over them. We weren't supposed to even glance at those Berelach and Yosselech and Estherlech; saying one word to them was out of the question! Some of the kids were crying; they probably understood. The soil was sandy, so some children made circles in the sand and they played with pebbles and branches. After all, they were only children.