After Michałówka, Korczak worked once more in children’s camps. Now for Christian children during the summers of 1907 and 1908. This gave him additional experience and an opportunity to test new ways of solving educational problems. It also resulted in another children's book, Józki, Jaśki i Franki, published in 1911.
In Józki, Jaśki i Franki Korczak also describes Zofiówka, a summer camp for girls. Both books were first printed in parts in a children's journal called Promyk and shorter descriptions with numerous photos in the newspaper Swiat.
Erwin Baum. a boy from the Korczak's Orphanage that survived Auschwitz describes the children's wars in Gocławek*:
The reaction was exciting because we didn't know about war. And a matter of fact, the feeling of war existed prior to the start of the war, like being in the camp (referring to Korczaks summer camp at Goclawek); we had a big place where we played in the sand, building airplanes, building boats, building different things. That summer we told everybody not to play, we are going to play war, like we made Polish Army and German Army. Me and another boy, we had a Polish army, and there was another boy by the name Mojzesz was the German Army. I was called Froim in the orphanage, I was also called Maly Icek. Icek is my brother, (therefore) I'm the Small Icek. So there was the army of Moses and the Army of Ariel and Froim – Ariel was the second general. And we prepared bunkers and all these things. And for bullets, we would save chestnuts, and when the war broke out, we start throwing chestnuts. When we got hit three times, had to be carried out, so that was the feeling that naturally Poland lost, and Germany won.
Jarek (Jaroslaw) Abramow, son of Igor Abramow Newerly, spends part of his vacations in 1940 at Korczaks summer camp. In his book The lions of my courtyard, Abramow describes the war with sand between Jewish children from Korczak's camp and the local Polish children. Jarek Abramow was seven at that time. Yes, it was 1940. Poland was occupied since September 1939. The area of the ghetto was not closed yet. It was marked by signs of a typhus epidemic. On the 12th of October 1940, Yom Kippur, Warsaw Jews were informed that the ghetto was being created. It was located in the northern part of the city.
* USHMM Archives RG-50.030*0016
** Hersz Korcarz - the name Hersz was in Goldszmit family, Korczaks grandfather. Probably Korczak was named after him. There are no original registration papers of Korczak and in later papers, he is mentioned as Henryk.